Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 1 - Review Exercises - Page 302: 52

Answer

The slope of the line passing through the points $\left( -1,-2 \right)$ and $\left( -3,-4 \right)$ is 1 and this line rises.

Work Step by Step

The slope of the line passing through two points $\left( {{x}_{1}},{{y}_{1}} \right)$ and $\left( {{x}_{2}},{{y}_{2}} \right)$ is provided by the formula $m=\frac{{{y}_{2}}-{{y}_{1}}}{{{x}_{2}}-{{x}_{1}}}$. Now, computing the slope of the line passing through the points $\left( -1,-2 \right)$ and $\left( -3,-4 \right)$ as follows: $\begin{align} & m=\frac{-4+2}{-3+1} \\ & =\frac{-2}{-2} \\ & =1 \end{align}$ Therefore, the slope of this line is 1. Now, since the slope of the line is positive, hence the line rises. Hence, the slope of the line passing through the points $\left( -1,-2 \right)$ and $\left( -3,-4 \right)$ is 1 and this line rises.
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