1. What is the slope of the line that passes through the points (-2, 5) and (1, 4)?

Question

A. -3
B. -2
C. -1/3 ***
D. 1/3

2. A line has a slope -5/3. Through which two points could this line pass?
A. (12, 13) and (17, 10)
B. (16, 15) and (13, 10) ***
C. (0, 7) and (3, 10)
D. (11, 13) and (8, 18)

3. The pair of points (6,y) and (10,1) lies on a line with the slope 1/4. What is the value of y?
A. -5
B. -2
C. 2
D. 5

4. What is the slope of the line that passes through the points (4, 2) and (4, -3)?
A. -1
B. 0
C. 1
D. Undefined

5. A car is 500 miles from its destination after 2 hours and 410 miles from its destination after 3.5 hours. What is the rate of change?
A. 1.5 miles per hour
B. 60 miles per hour ***
C. 90 miles per hour
D. 135 miles per hour

Answer 1

2. A line has a slope -5/3. Through which two points could this line pass?
A. (12, 13) and (17, 10)
B. (16, 15) and (13, 10) ***
C. (0, 7) and (3, 10)
D. (11, 13) and (8, 18)

(10-15)/(13-16) = POSITIVE 5/3
try D

Answer 2

3. The pair of points (6,y) and (10,1) lies on a line with the slope 1/4. What is the value of y?
A. -5
B. -2
C. 2
D. 5
----------------
(1-y)/(10-6) = 1/4
so
1 - y = 1
y = 0

Answer 3

4. What is the slope of the line that passes through the points (4, 2) and (4, -3)?
A. -1
B. 0
C. 1
D. Undefined
----------------------
denominator is 4-4 = 0
undefined (although actually that is just the vertical line x = 4)

Answer 4

90 miles in 1.5 hours
yes 60 mph

Answer 5

On 3. 0 isn't an answer..

Answer 6

from (6,0)
to (10,1)
is up 1 and right 4
so slope = 1/4
so if 0 is not an answer, you have a typo