APFIVE Linear Regression Slope Interpretation
A least-squares regression line given by $$\hat{y} = a + 2x$$ is used to predict the number of popcorn boxes sold, y, based on theater attendance, x. Which of the following is the correct interpretation of the slope?
A
For every additional attendee, approximately 2 more boxes of popcorn are sold on average.
B
There is no change in popcorn sales with changes in attendance.
C
The total number of popcorn boxes sold is twice the total attendance.
D
Attendance increases by 2 people for every additional box of popcorn sold.
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