Data Are Given for Y as a Power Function of X

Data are given for y as a power function of x. Write an equation for the power function, and state its power and constant
of variation.
-

A) $\mathrm { y } = 2 \sqrt [ 3 ] { \mathrm { x } } ;$ Power $= \frac { 1 } { 3 } ;$ constant of variation $= 2$
B) $\mathrm { y } = 0.5 \mathrm { x }$ ; Power $= 1$ ; constant of variation $= 0.5$
C) $\mathrm { y } = 2 \sqrt [ 3 ] { \mathrm { x } }$ ; Power $= - 3$ ; constant of variation $= 2$
D) $\mathrm { y } = \sqrt { \mathrm { x } }$ ; Power $= \frac { 1 } { 2 }$ ; constant of variation $= 1$