### Home > CC4 > Chapter 2 > Lesson 2.2.4 > Problem 2-85

2-85.

Calculate the slope of the line passing through each pair of points below. Homework Help ✎

(1, 2) and (4, –1)

Review the Math Notes box in Lesson 2.1.4 on slope.

(7, 3) and (5, 4)

See Hint (a):

(–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 calculate the slope correctly.

She

have gotten −1 for her slope.**should**

Can you figure out what mistake she made?