Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 3 - Introduction to Graphing - Mid-Chapter Review - Mixed Review: 15

Answer

$m=-3$

Work Step by Step

Using $m=\dfrac{y_1-y_2}{x_1-x_2}$ or the Slope Formula, then the slope, $m$, of the line containing the given points, $( 1,2 )\text{ and } ( 4,-7 )$, is \begin{array}{l} m=\dfrac{2-(-7)}{1-4} \\\\ m=\dfrac{2+7}{1-4} \\\\ m=\dfrac{9}{-3} \\\\ m=-3 .\end{array}
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