Part A: Scatter plot with best-fit line attached. You'll find the line to have equation (approximately)

The positive slope suggests that test scores and study time are directly are proportional.
Part B: Same as in a previous question you had posted. Pick two points on the provided line and compute the slope as best you can. For example, I might pick (2, 30) and (4, 40), which gives a slope of

and assuming the line passes through (2, 30) exactly, it would have equation

Answer:
55 ° is correct answer option (c)
Answer:
35 mins lost
out of 3 and 1/2 hrs = 3.5 x 60 mins = 210 mins
%time lost = time lost/total time x 100
= 35/210 x 100
= 1/6 x 100
= 16.66666 %
Answer:
-20x 87y
Step-by-step explanation: