Question

The slope of the line that passes through the points (-10,y) and (5, 2) is 2/5. What is the value of y?

A. 0
B. 4
C. -4
D. -2

show ur work for extra points pls

Answer 1

C, -4

Explanation:

slope=change in y/change in x

`(2 - y)/(5 - ( - 10)) = (2)/(5)`

`(2 - y)/(5 + 10) = (2)/(5)`

multiply both sides by 2/5

`2 - y = (2)/(5) (5 + 10)`

simplify the right side. 2/5 × 5 = 2 and 2/5 × 10 = 4

`2 - y = 2 + 4`

`2 - y = 6`

bring y to the other side by adding y on both sides

`2 = 6 + y`

subtract 6 on both sides

`2 - 6 = y`

so y is -4