SOLUTION: x:1,2,3,4,5 y:3.2 , 12.8 , 28.8 , 51.2 , 80.0 What is the relationship between x and y? a. y is directly proportional to x b. y is inversely proportional to x c. y is propor

Question 1001740: x:1,2,3,4,5
y:3.2 , 12.8 , 28.8 , 51.2 , 80.0
What is the relationship between x and y?
a. y is directly proportional to x
b. y is inversely proportional to x
c. y is proportional to x^2
d. y is independent of x
Thanks.
Please explain!!!!!!!!
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
Do you notice what happens to the y values as you change the x values?
As x doubles from one to two, y goes up by a factor of four.
As x goes from one to three, y goes up by a factor of nine...and so on...
Thus y is proportional to x^2.
Choice c.
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