Question

y is inversely proptional to x when y = 7, x = 9 a) work out an equation connecting y and x b) work out the value of y when x = 21

Answer 1

a) yx=63

b) y=3

Explanation:

a)

yx=k (inverse formula)

7(9)=k

63=k

b)

y(21)=63

y=63/21

y=3