Question

Y is inversely proportional to x.
When y=80, x=3
Work out y when x=4

Answer 1

60

Explanation:

As, y is inversely proportinal to x.

So, y=k×(1/x) where k is a constant

Now, 80=k× 1/3

k=80×3=240

Now, when x=4;

y=k/x=240/4=60

Hope, this helps you.