### Home > AC > Chapter 7 > Lesson 7.2.3 > Problem 7-75

7-75.

Find the slope of the line passing through each pair of points below. Homework Help ✎(1, 2) and (4, −1)

(7, 3) and (5, 4)

(−6, 8) and (−8, 5)

(55, 67) and (50, 68)

Azizah got 1 for the slope of the line through points (1, 2) and (4, −1). Explain to her the mistake she made and how to find the slope correctly.

Either graph the two points to make a slope triangle or subtract the *x*-values from each other and the *y*-values from each other and substitute them into the slope formula.

Δ*x*: 1 − 4 = −3

Δ*y*: 2 − (−1) = 3

slope = −1

Use the same strategy to solve parts (b) through (e).