Question

The pair of points (-4, y) and (5, 7) lie on a line with slope 1/3

. What is the value of y?

Answer 1

Explanation:

(7 - y)/(5 + 4) = 1/3

(7 - y)/9 = 1/3

21 - 3y = 9

-3y = -12

y = 4