Question

Suppose that x and y vary inversely, how do you write a function that models each inverse variation when given x=1.2 when y=3?

Answer 1

In an inverse function: `x*y=C`, `C` being the constant.

Explanation:

We use what we know:
`1.2*3=3.6=C`

In general, since `x*y=C->`:

`x*y=3.6->y=3.6/x`
graph{3.6/x [-16.02, 16.01, -8.01, 8.01]}