Question

The points (x, 3) and (-2, 2) have a slope of 1. What is the x-coordinate of the point
(x, 3)?

Answer 1

(-1,3)

Explanation:

The slope is given by

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

1 = (2-3)/(-2-x)

Multiply each side by (-2-x)

(-2-x) = -1

Multiply by -1

2+x = 1

Subtract 2 from each side

2+x-2 = 1-2

x = -1