the slope of the line going through the points (-7,9) and (9,y) is -7/8. What is the value of y

Question

The word problem is a linear equation and is solving for y

Answer 1

set up an expression using the slope equation and then solve for the value of y!

(y - 9) / (9 - -7) = -7/8

(y - 9) / 16 = -7/8

(y - 9) = -7/8(16)

y = -14 + 9

y = -5

Answer 2

There's an equation defining slope m, when you have two given points.

 

Substitute everything that you can into that formula, and then solve for y.