What is the monthly rate of change (slope) of the least squares trend line for these data?
A)320
B)102
C)8
D)-0.4
E)-8

Question

Quizplus · Accepted Answer

To find the monthly rate of change (slope) of the least squares trend line for these data, we need to find the slope of the line. Using a regression calculator, we get the equation y = -0.4x + 320. The coefficient of x, -0.4, represents the monthly rate of change, which is the slope of the line. Therefore, the answer is D) -0.4.

What Is the Monthly Rate of Change (Slope) of the Least