Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 5 - Linear Functions - 5-1 Rate of Change and Slope - Practice and Problem-Solving Exercises - Page 297: 29


Positive; $m=12$

Work Step by Step

The slope is positive, because the more uniforms ordered, the greater the cost. 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 from the figures stated in the problem: $m=\frac{114-66}{9-5}$ We simplify above and below the fraction bar with subtraction: $m=\frac{48}{4}$ We divide the fraction: $m=12$
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