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

Question

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

luigi0210 · Answer

A direct variation is:
y=kx

anonymous · Answer

so how do i figure this out ?

luigi0210 · Answer

Is that x^2 and x^3?

anonymous · Answer

yes. my fault

whpalmer4 · Answer

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.

luigi0210 · Answer

the ones with the power are exponents

luigi0210 · Answer

so that eliminates half the choices

anonymous · Answer

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

anonymous · Answer

Yes you are correct.

anonymous · Answer

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