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Chapter 3: Q 4. (page 143)

If the independent variable in a line of best fit y=-0.008x+14is credit score, and the dependent variable is the interest rate on a used car loan, then the slope is interpreted as 鈥渋f credit score increases by 1 point, the interest rate will (increase/decrease) by percent, on average.

Short Answer

Expert verified

If the independent variable in a line of best fit y=-0.008x+14is credit score, and the dependent variable is the interest rate on a used car loan, then the slope is interpreted as 鈥渋f credit score increases by 1 point, the interest rate will decrease (increase/decrease) by 0.008 percent, on average.

Step by step solution

01

Step 1. Define increasing and decreasing function.

If the slope (m) of a linear function y=mx+bis positive, it increases throughout its domain and if the slope (m) is negative, it decreases over its domain.

02

Step 2. Fill the blank in the given statement.

If the independent variable in a line of best fit y=-0.008x+14is credit score, and the dependent variable is the interest rate on a used car loan, then the slope is interpreted as 鈥渋f credit score increases by 1 point, the interest rate will decrease (increase/decrease) by 0.008 percent, on average.

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