I DONT GET THIS AND ITS MY FINAL

Some high school students conducted an experiment as part of their school project to understand the relationship between the height a parasail can attain and the speed of the motorboat that tows it. The data table lists their observation about the height of the parasail at different speeds. Which equation represents the height of the parasail (y) based on the speed of the motorboat (x)?

speed Height
MPH feet
12.5 5
14.5 10
16.5 15
18.5 20
20.5 25
22.5 30

A)y = 2.5x
B)y = 0.4x
C)y = 2.5x – 26.25
D)y = 0.4x + 4.2

Question

I DONT GET THIS AND ITS MY FINAL 



Some high school students conducted an experiment as part of their school project to understand the relationship between the height a parasail can attain and the speed of the motorboat that tows it. The data table lists their observation about the height of the parasail at different speeds. Which equation represents the height of the parasail (y) based on the speed of the motorboat (x)?

speed      Height
MPH         feet
12.5        	5
14.5  	10
16.5 	15
18.5 	20
20.5 	25
22.5 	30

A)y = 2.5x
B)y = 0.4x
C)y = 2.5x – 26.25
D)y = 0.4x + 4.2