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: 17

Answer

$m=1$

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, $( -1,10 ) \text{ and } ( -9,2 ),$ is \begin{array}{l}\require{cancel} m=\dfrac{10-2}{-1-(-9)} \\\\ m=\dfrac{10-2}{-1+9} \\\\ m=\dfrac{8}{8} \\\\ m=1 .\end{array}
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