Question

What is the slope of the line that passes through the pair of points (2, 9), and (5, 12)?

A. 0
B. 1
C. 3
D. undefined

Answer 1

Consider the slope formula m = (y2 - y1) / (x2 - x1). Give it a shot.

Answer 2

0?

Answer 3

Let's let (x1, y1) = (2, 9) and (x2, y2) = (5, 12).

(y2 - y1) / (x2 - x1) = (12 - 9) / (5 - 2) = 3/3 = 1 = slope.

Answer 4

Aah! I see why i got it wrong now. Thank you!