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: 28

Answer

Negative; $m=-2$

Work Step by Step

The slope is negative, because the more questions the student answers incorrectly, the lower his score is. 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: $m=\frac{98-90}{1-5}$ We simplify above and below the fraction bar with subtraction: $m=\frac{8}{-4}$ We divide the fraction: $m=-2$
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