A college football coach wants to know if the is a correlation between his players' leg strength and the time it takes for them to sprint 40 yards. he sets up the following test and records the data:

Question

Every day for a week, he counts how many times each player can leg press 350 pounds. The following week, he has each player sprint 40 yards every day. The tables shows the average number of leg-press repetitions and the average 40-yard dash time (in seconds) for seven randomly selected players. What is the equation of the line of best fit? How many seconds should he expect a player to take to run 40 yards if that player can do 22 leg-press repetitions?

Leg Press (reps)|40-yard Dash (s)
15 |5.2
18 |6.3
8 |6.8
30 |8.2
26 |8.0
12 |5.3
21 |5.9

Answer 1

what's the answer

Answer 2

Does anyone know the answer?

Answer 3

is someone not going to answer this

Answer 4

Can someone please answer the question, like, today

Answer 5

whats the answer???

Answer 6

why can't anybody answer this?!?!?!?

Answer 7

GUYS I HAVE THE ANSWER:

LP divided by PL = Sp/Distance = Player x

You're welcome, fellow Connections Academy students.

Answer 8

i don't get it

Answer 9

What's the answer? And wtf Mb?

Answer 10

It's an equation. That's the answer and I got it right. Take it or leave it, it's not my grade. :)

Answer 11

40=30/8(26+8)

Answer 12

is that the right answer anonymous?

Answer 13

right/

Answer 14

Are you sure this is the answer??

Answer 15

WHAT IS IT

Answer 16

lol greatest freakout ever.

Answer 17

what was the answer

Answer 18

Wow that's sad

Answer 19

I know the answer:
equation= y= -0.05x+6.7
ur welcome :)

Answer 20

Thank You stacie, I hope your right!

Answer 21

does anyone know if any of these equations were correct? ;-;

Answer 22

So we all agree that stacie is wrong? right?

Answer 23

How does that even make any sense?

Answer 24

Wow, this is depressing

Answer 25

dude xDD this is horrible. im using astacie's answer.

Answer 26

The exact equation is y = 4.536 + 0.107 Try that with all of the x values and you should get the y values listed next to the x values. Now we have to find how many seconds a player will take to run 40 yards if they can do 22 leg presses.
y = 4.536 + 0.107 * 22
0.107 * 22 = 2.354
y = 4.536 + 2.354
y = 6.89
Now to round to the nearest tenth and you should get 6.9
Good Luck!

Answer 27

suck it

Answer 28

not funny

Answer 29

Your Welcome is right, and also, Your Welcome I see you are cross posting this answer on other websites (which there is no problem with) I just sugest you use 1 name for Open Study, Brainly, and Jiskha! :)

Answer 30

i really really really hope your welcome is right bc this was hard & omg i hate math.

Answer 31

so just copy+pastee?

Answer 32

Does anyone have the answers to the test?

Answer 33

Your welcome has the correct answer.

Answer 34

Guys don't listen to Your Welcome used their equation and i double checked my work and I never got 6.9...

Answer 35

Hey! How about you just try doing it yourself. By the time you actually find the right answer on here, you could have done this and another problem at this point

Answer 36

I know I’m a year ahead of this post, but seriously “Dude”, this thread ended a year after you came in. It was dead, then you tried to insert your opinion.

Answer 37

so whats the right answer lol

Answer 38

Linear function test unit6 lesson 10
1. A
2. D
3. D
4. A
5. C
6. C
7. B
8. C
9. D
10. C
11. B
12. B
13. A
14. A
15. B
16. C
17. C
18. D
19. C
20. B
21. A
22. A
23. Not very close
24. I don't know

Answer 39

Dont use Ruby's answer, I just tried it and half of them are wrong

Answer 40

The correct answer is the equation of the line of best fit is y=0.11x+4.54, and it would take the player 6.96 seconds to run.
Explanation:
Using technology, we calculate the line of best fit; we first enter the data points as a scatter plot, then run the regression tool, which gives us y=ax+b, where a=0.11 and b=4.54.
We now use this equation, y=0.11x+4.54, to calculate the amount of time it would take a player to run 40 yards if the player can do 22 leg-press reps:
y=0.11(22)+4.54=6.96.

here ya fools

Answer 41

1. C. Yes; y = 1.625x
2. D. no; y does not vary directly with x.
3. D. line in graphs goes through -6.
4. C. line in graph goes through -7 and +2
5. B. 46/1;your car travels 46 miles in 1 hour
6. C. 1/4.
7. B. -2/3
8. C. undefined
9. C. y-3=5(x-8)
10.C. y+2=-1/2(x+4)
11.B. y-21=7(x-3)
12.B.
13.A
14.D.
15.B.
16.C.
17.C.
18.A.
19.A.
20.A.
21.A.
22.A

Answer 42

not all my questions were the same so if yours were different aswell here you go. 1.C yes;y=1.625x
2.D no; y does not vary directly with x
-match equation to graph
3. y=2/5x-1 is D
4.-4x+6y=24 is A
5. A 51/1; your car travels 51 miles every 1 hour.
6. A 1/3
7. B -1/3
8. C undefined
9. D y-2=3(x-5)
10. C y+6=-5/8(x+10)
11. A y-16=8(x-2)
12. x=-4 the graph is B
13. A 3x+4y=12
14. A y=2x+2
15. B perpendicular
16. C neither
17. B y-3=-3/8(x+2)
18. A it ends in -3
19. C it ends with shifted 2 units left
20. graph for y=|x|-5 is A
21. graph for y= |x-4| is B
22. C negative correlation

Answer 43

I don't know who's answer I should use :0 ima get this wronggg

Answer 44

... i just got half of my test wrong because of a person so imma post the answers. The real answers bc this is bull%@#
C
D
D
D
C
A
B
C
B
C
B
B
A
B
B
C
B
D
A
B
B
A
you do these 2 on your own

Answer 45

Wheels On The Bus was correct

Answer 46

Guys im so flippin confused. Who the hell do i listen to??

Answer 47

Ummmmmmm..? Does anyone know the RIGHT answer?

Answer 48

THE CORRECT ANSWER:

equation is
y=0.11x+4.54

And it would take the player 6.96 seconds to run.

Answer 49

nice thread

Answer 50

Damn, reading these gets me high in a good mood.

Answer 51

honestly i’m probably gonna get all my questions wrong cus i keep changing them but once i see what the real answers are i will post them

Answer 52

update i got 11/22 fml

Answer 53

REAL ANSWERS!!!:
a
d
d
c
b
c
b
c
c
c
a
a
a
a
b
c
c
d
c
a
b
d
written question
written question

Answer 54

they change everyones questions around so we cant cheat lol you have to put the actual answer not the letter. thats why half of them are wrong. im about to fail algebra so i just need the answer

Answer 55

I finished the test a while back. I hope this helps anyone.
1: yes; y = 1.625x
2: no; y does not vary directly with x
3: y = 1/3x - 6 Graph: D
4: -4x + 6y = 24 Graph: A
5: 46/1; your car travels 46 miles in 1 hour
6: 1/4
7: -1/2
8: undefined
9: y - 3 = 5(x - 8)
10: y + 6 = -5/8(x + 10)
11: y - 18 = 9(x - 2)
12: x = -5 Graph: A
13: 3x + 4y = 12
14: y = 3x + 4
15: perpendicular
17: y - 3 = -3/8(x +2)
18: The functions have the same shape. the y-intercept of y = x is 0, and the y-intercept of the second function is -5.
19: the two graphs have the same shape, but the seond graph is shifted 5 units left.
20: y = x - 2 Graph: C
21: y + x - 4 Graph: B
22: negative correlation
23: Wouldn't be confident.(you should probably write why you wouldnt be in the paragraph too.)
24: y=0.11(22)+4.45=6.96

Remember that the questions are always changing. So, be sure the look closely at my wording and the wording of your questions to make sure it's the correct answers for YOUR test. That's also the exact reason why I put in the actual answers and not: "C, D, D-etc.". Good luck, everybody!

Answer 56

i know that they change around the questions... so, i wrote down the question and answer just in case. i really hope this helps anyone!! :)
there are some questions that i was told by my teacher that had different options from what is listed. meaning that some people have completely different answers than others on some questions. im not 100% sure if everyone's is like this, but if yours is ill write those down on the bottom.

now the answers...

1. for the data in the table, does y vary directly with x? if it does, write an equation for the direct variation
x y
8 13
16 26
24 39
a- yes;y=1.625x

2. for the data in the table, does y vary directly with x? if it does, write an equation for the direct variation
x y
32 24
16 8
8 6
a- no; y does not vary directly with x

3. the grade a student earns on a test varies directly with the amount of time the student spends studying, suppose a student spends 6.5 hrs studying and makes a grade of 84% on the test. what is an equation that relates the grade earned on a test, g, with the amount of time spent studying, t, in hrs? what is the graph of your equation?
(the graphs are a little harder to explain, hope you get what im trying to say)
a- the graph ends on (6, 70) its pointed more up than the others

4. match the equation with its graph
y= 3/4x - 2
a- its the only line that passes through the bottom-right coordinate block

5. match the equation with its graph
-2x + 7y = 14
a- the left part of the line only goes a tinny-bit into the bottom-left coordinate block.

6. express the relationship between distances and the time in simplified form as a unit rate. determine which statement correctly interprets this relationship.
a- mine was 58/1 but i did see some other people that had 46/1

7. find the slope of the line.
a- 1/5

8. what is the slope of the line that passes through the pair of points (1,7) and (10,1)
a- 2/3

im lowkey tired asf its literally 4:50 am where i live in texas rn...so im going to sleep buuuut ill try to finish up with the answers tmrw/later today with a different post. hope this doesn't affect anyone until I'm back

Answer 57

^
Thank you for painstakingly writing the questions and answers.

Answer 58

If you're going to post answers, have enough sense to distinguish Honors Algebra and regular Algebra.

Answer 59

1 A y=1.2x
2 D No y doesnot
3 D graph
4 c
5 b 46/1
6 c 1/4
7 b -1/3
8 c undefined
9 d y-2=3(x-5)
10 c y+6
11 b y-21=7(x-3)
12 a
13b 5x +8y =24
14 a y=2x+2
15 b perpendicular
16. C neither.
17 c
18 a
19 a. 5 unit left
20 b
21 b
22. D no correlation

Answer 60

my teacher web mailed me and said “hello! this answer is taken directly from (then the jiskha website) and now i have to complete the problem on paper and send it to her :/

Answer 61

heh I'm just reading looking at all the freak-out's from the past lol

Answer 62

its 80=12+5=2x+5

Answer 63

this was entertaining... also uh oh plz don't forget to use these answers as a guide only, because of the honor code and the fact they can use checkmywork they will be able to find anything and everything that your answer could be related to

Answer 64

MB right thxs so much!