Question

Which of the following functions represents a direct variation?
A. y = x2
B. y = -8x
C. y = -2/x
D. y = x3

Answer 1

A direct variation is:
y=kx

Answer 2

so how do i figure this out ?

Answer 3

Is that x^2 and x^3?

Answer 4

yes. my fault

Answer 5

One of the answers is a direct variation with the square. Another is a direct variation. Yet another is an inverse variation. Finally, one is a direct variation with the cube.

Answer 6

the ones with the power are exponents

Answer 7

so that eliminates half the choices

Answer 8

okay, you guys arent making sense ): and i kinda just feel stupid now.

Answer 9

Yes you are correct.

Answer 10

well yea it is you just have to study the problems carefully