Question

The value of y is inversely proportional to the value of x. When y=40, x=5. What is the value of y when x=8

Answer 1

Since x and y are inversely proportional:

xy = c, where c is a constant

when y = 40 and x = 5 -> c = 40*5 = 200

So xy = 200

Then, when x = 8, y = 200/8 = 25