Question

5.Select all representations for the domain of a function given by the number of hours slept in one day. (2 points)
Responses

(24, ∞)
(24, ∞)

(0, 24)
(0, 24)

{x| x>24}
{x| x>24}

[0, ∞)
[0, ∞)

[0, 24]
[0, 24]

{x | 0≤ x ≤24}
{x | 0≤ x ≤24}

{x| x∈R}
{x| x∈R}
4.The function h(t)=−16t2+75t
represents the height of a ball thrown up into the air after t seconds. What does h(5)
represent?(1 point)
Responses

The ball took 5 seconds to hit the ground.
The ball took 5 seconds to hit the ground.

The time it takes the ball to reach its maximum point is 5 seconds.
The time it takes the ball to reach its maximum point is 5 seconds.

The final height is 5 feet.
The final height is 5 feet.

The height of the ball 5 seconds after it has been thrown.
3.Given f(x)=4x+5
, evaluate the function for f(2)
.(1 point)
Responses

f(2)=11
f of 2 is equal to 11

f(2)=16
f of 2 is equal to 16

f(2)=13
f of 2 is equal to 13

f(2)=21
f of 2 is equal to 21
2. Determine whether the following relations are functions



x y
2 4
-3 5
8 0
2 4





Not a Function





1.Which of the values below could be used for x and would cause the following relation to NOT be a function?

{(3,-1), (-1,5), (2,-4), (6, 2), (x,-9)}

(1 point)
Responses

x = 5
x = 5

x = 6
x = 6

x = -4
x = -4

x = 0

Answer 1

1. x = 6

2. The relation IS a function (the repeated pair (2,4) doesn’t change the mapping).

3. f(2) = 13

4. h(5) is the height of the ball 5 seconds after it has been thrown.

5. [0, 24] and {x | 0 ≤ x ≤ 24}