Question

Suppose that (y) varies with (x). Write an equation for the inverse variation.

y=4 when x=7

A: y= x/28

B: y=3x

C: x= y/3

D: y= 28/x

Answer 1

y = k/x, where k is the constant
if x = 7 and y = 4
4=k/7

k = 4*7 = 28


y = 28/x

answer is D