Answer
$\dfrac{y_2-y_1}{x_2-x_1}$
Work Step by Step
RECALL:
The slope $m$ of a line can be found using the formula:
$m=\dfrac{y_2-y_1}{x_2-x_1}$
Thus, the missing expression in the given statement is:
$\dfrac{y_2-y_1}{x_2-x_1}$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 1 - Section 1.4 - Linear Functions and Slope - Concept and Vocabulary Check - Page 212: 2
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