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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. (1, 2) and (4, –1)

  • Review the Math Notes box in Lesson 2.1.4 on slope.

  1. (7, 3) and (5, 4)

  • See Hint (a):

  1. (–6, 8) and (–8, 5)

  1. (55, 67) and (50, 68)

  1. Stoplight imageAzizah 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 should have gotten −1 for her slope.
    Can you figure out what mistake she made?