Question

Suppose y varies inversely with x. How do you write an equation for each inverse variation given y = 15 when x = 2?

Answer 1

`y = 15/x`

Explanation:

Write an inverse proportion first:

`y prop1/x`

Make a proportion into an equation by multiplying by a constant.#

`y = k/x " Now find the value of the constant"`

`k = xy rArr 2 xx 15 = 30`

The inverse proportion then becomes:

`y = 15/x`