A typing service keeps data on the number of pages (x) in a manuscript and the length of time (y) (in hours) it takes to complete the typing. The least-squares regression line for the data is given by y = 20 + 0.273x. Use this to predict the amount of hours needed to type a 40-page manuscript.
A) 810.92
B) 60.273
C) 30.92
D) 16.38

Question

Quizplus · Accepted Answer

Using the equation y = 20 + 0.273x, we can substitute x = 40 to find the predicted time for typing a 40-page manuscript:
y = 20 + 0.273(40) = 30.92
Therefore, the predicted time for typing a 40-page manuscript is approximately 30.92 hours, which is answer choice C.

A Typing Service Keeps Data on the Number of Pages