Question

The points (-3 r) and (9 2) lie on the line with slope 1/4. find the missing coordinate

Answer 1

Answer: -1

Explanation:

I assume the points are (-3, r) and (9,2).

Substituting into the slope formula,

`(r-2)/(-3-9)=(1)/(4)\\\\(r-2)/(-12)=(1)/(4)\\\\r-2=-3\\\\r=-1`