Question

The variables x and y vary inversely. How do you write an equation that relates x and y given x = 15, y = 5?

Answer 1

`y=75/x`

Explanation:

`y=k/x`, where `k` is a constant

Substitute in `x=15,y=5`,
`5=k/15`
`k=75`

Hence, `y=75/x`