Question

The points (-7,r) and (5,1) lie on a line with slope 1/2. Find the missing coordinate r.

Answer 1

r = -23

Explanation:

A slope of 1/2 means that for every y-value increase of 1, the x value will increase by 2.

Between -7 and 5, there was an increase of 12. So, the x value will increase by 24.

To find r, subtract 24 from 1

1 - 24

= -23

So, r = -23