Inverse Variation

Question

If y varies inversely with x and y is 10 when is 5, then what is y when x is 2?

Answer 1

y = k/x

Since y = 10 when x = 5, 10 = k/5

So, k = 50

So, the relationship between x and y is y = 50/x.

Therefore, when x = 2, y = 50/2 = 25