Question

Suppose that x and y vary inversely and that y = 5 when x = 1. What is y when x = 15?

Answer 1

Y=1/3

Explanation:

X=k/y

So let's make k the subject of formula

k=xy

x=1,y=5

So let's substitute

k=1×5

k=5

So we are to determine the value for y when x is 15

So let's solve

Y=k/x

Y=5/15

Y=1/3

Y=0.333333~0.3