Question

Which of the following functions represents a direct variation?
y = x2
y = -8x

y = x3

Answer 1

Shouldn't they be all of them?

This is because direct variation means that y's value is relative to to the constant multiple of x.

Answer 2

In this case, x belongs to all of them, and there is not a constant.

Answer 3

noo its only one, but i dnt know which one to choose

Answer 4

noo its only one, but i dnt know which one to choose

Answer 5

Then, it should be the second one. The second one looks right because "x" is after the coefficient.

Answer 6

thank you!..i got it right