Question

The function F(x) varies inversely with x and f(x) = 25 when x = 6 what is f(x) when x= 18

Answer 1

8.333

Explanation:

F(x) α 1/ x

F(x) = k/x

F(x) = 25 ; x = 6

Lets use the information above to obtain the value of k

25 = k/6

k = 25 * 6 = 150

k = 150

Therefore, the value of f(x) when x = 18 will be :

Using the relation :

F(x) = k/x

k = 150, x = 18

F(x) = 150 / 18

F(x) = 8.333