Answer:
The value of y is 89.55 at x=15 and 60.69 at x=9.
Step-by-step explanation:
The equation of best fit line is
where, y is scores of two students after x working hours.
We need to find the score after 15 and 9 hours.
Substitute x=15 in the given equation.
Substitute x=9 in the given equation.
Therefore, the value of y is 89.55 at x=15 and 60.69 at x=9.