Answer: Slope of the line = 0.75.
Explanation:
Since we have given that
Number of tests = 27
Number of weeks = 36
According to question,
Number of tests is on the y-axis and the time in weeks is on the x-axis.
So, the coordinates are the (0,27) and (36,0)
As we know the formula for "Slope of line":

Hence, Slope of the line = 0.75.