Question

A line passes through the point (-2,7) and has a slope of -5. What is the value of a if the point (a,2) is also on the line?

Answer 1

a = -1

Explanation:

The slope, m from point -2,7 to a,2 has to be -5

m = (y1-y2)/(x1-x2)

-5 = ( 7-2)/(-2 -a) solve for 'a'......cross multiply

10+ 5a = 5

5a = -5

a = -1