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Chapter 12

Question 9

Regression equation

In a forecasting model based on y = a + bx, the intercept on the y-axis is 2,580.
If the value of y is 4,100 when x is 95, calculate the value of b.

4,100 = 2,580 + b × 95

1,520 = b × 95

b = 1,520/95 = 16

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