Chapter 3 - Introduction to Graphing - 3.5 Slope - 3.5 Exercise Set: 19

$\frac{1}{2}$ point per $\$1000$increase in family income. Work Step by Step The graph contains the points$(50, 490)$and$(90, 510)$. To find the rate of change in the SAT critical reading scores with respect to family income, use the formula$\dfrac{\text{change in y}}{\text{change in x}}$. rate of change =$\dfrac{510-490}{90-50}=\dfrac{20}{40}=\dfrac{1}{2}$Thus, the rate of change in SAT critical reading scores with respect to family income is$\frac{1}{2}$point per$\$1000$ increase in family income.

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