Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 5 - Linear Functions - Mid-Chapter Quiz - Page 321: 2


The rate of change is 25 meters per second.

Work Step by Step

You have the points: (3,75)(6,150)(9,225)(12,300). The rate of change is constant so we can pick two points and plug them into $\frac{y2-y1}{x2-x1}$: $\frac{y2-y1}{x2-x1}$ and (6,150),(12,300) Thus; $\frac{300-150}{12-6}$=$\frac{150}{6}$=25. The rate of change is 25 so the car travels 25 meters every second.
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