Solution:
Given the scatterplot, the line of best fit is as shown below:
To evaluate the equation of the line of best fit, we use the line equation.
The equation of a line that passes through two points is expressed as

From the above scatterplot, the line of best fit passes exactly through the points (5, 50) and (50, 250).
This implies that

Substituting these values into the line equation, we have
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