The Dean of a School of Business Is Forecasting Total

The dean of a school of business is forecasting total student enrollment for this year's summer session classes based on the following historical data: $$\begin{array} { | l | c | } \hline { \text { Year } } & \text { Enrollment } \\\hline \text { Four years ago } & 2000 \\\hline \text { Three years ago } & 2200 \\\hline \text { Two years ago } & 2800 \\\hline \text { Last year } & 3000 \\\hline\end{array}$$
What is the annual rate of change (slope) of the least squares trend line for these data?

A)  0
B)  200
C)  400
D)  180
E)  360

Correct Answer:

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