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 - Concept Quiz 8.3 - Page 349: 10



Work Step by Step

To find the slope, we use the formula $m=\frac{y_2-y_1}{x_2-x_1}$. We plug in the $x$ and $y$ values given: $m=\frac{4-(-1)}{-1-2}$ We simplify above and below the fraction bar using subtraction: $m=\frac{5}{-3}$ Then, we move the negative sign out front: $m=-\frac{5}{3}$ $-\frac{5}{3} \ne \frac{5}{3}$, so the statement is false.
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