Question

y varies inversely with x, and x = 7 when y = 35. Find the inverse variation equation and use it to find the value of x when y = 50.
Answer

4.9

5

0.2

250

Answer 1

Since x and y are inversely related
xy = k, where k is constant of proportionality
When x = 7, y = 35,
7(35) = k i.e. k = 245
Thus xy = 245
When y = 50,
50x = 245
x = 4.9