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.
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A) $\mathrm { y } = - \frac { 16 } { \mathrm { x } ^ { - 2 } } ;$ Power $= - 2 ;$ constant of variation $= - 16$
B) $y = - 16 x$ ; Power $= 1$ ; constant of variation $= - 16$
C) $y = - \frac { 16 } { x }$ ; Power $= - 1$ ; constant of variation $= - 16$
D) $\mathrm { y } = \frac { 16 } { \mathrm { x } ^ { 2 } } ;$ Power $= - 3 ;$ constant of variation $= 16$