Question

A line goes through the point (6,-2) and has a slope of

-3
What is the value of a if the point (a, 7) lies on the line?
a
Dome

Answer 1

Explanation:

eq. of line is y-(-2)=-3(x-6)

y+2=-3x+18

y=-3x+18-2

y=-3x+16

∵(a,7) lies on it.

7=-a+16

a=16-7=9

a=9