CPM Homework Help : GB8I Problem 2-85

CPM Homework Banner

Home > GB8I > Chapter 2 Unit 2 > Lesson INT1: 2.2.4 > Problem 2-85

2-85.

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

$(1, 2)$ and $(4, –1)$

Hint (a):
Review the Math Notes box in Lesson 2.1.4 on slope.
Answer (a):
$\text{Slope }=\frac{\Delta y}{\Delta x}=\frac{-1-2}{4-1}=\frac{-3}{3}=-1$

$(7, 3)$ and $(5, 4)$

Hint (b):
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.

Hint (e):
She should have gotten $−1$ for her slope.

© 2022 CPM Educational Program. All rights reserved.