Answer:
4
Step-by-step explanation:

Hi there.
They are basically asking how you could change the graph in a way so that the change in wins isn't as noticeable. This can be done by starting at zero number of wins on the y-axis.
Answer:
Angles 2,5, and 6 are all 138.
Angles 1,3,4, and 7 are all 42.
Explanation: 180-138=42
$6.25 is the price it will cost for 15 sq ft