Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 8 - Coordinate Geometry and Linear Systems - 8.3 - Slope of a Line - Problem Set 8.3 - Page 349: 7

Answer

$m=-\dfrac{10}{3}$

Work Step by Step

Using $m=\dfrac{y_1-y_2}{x_1-x_2}$, the slope of the line determined by the given points, $( -2,5 ) \text{ and } ( 1,-5 ),$ is \begin{array}{l}\require{cancel} m=\dfrac{5-(-5)}{-2-1} \\\\ m=\dfrac{5+5}{-3} \\\\ m=\dfrac{10}{-3} \\\\ m=-\dfrac{10}{3} .\end{array}
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