Question

What is the missing x-coordinate for a line that has a slope of -2 and goes through the points (5, 1) and (x, -3)

Answer 1

X=7

Explanation:

we already know the slope is -2, so y=-2x+m

since the line goes through point (5,1)

1=(-2)x5+m

1=m-10

m=11

the equation should be y=-2x+11

-3=2x+11

-14=2x

x=7