Question

If x varies directly as y and x =16 when y=4.find x when y=9

Answer 1

answer is 81

Step-by-step explanation:

x varies directly as y

when x=16, y=4

therefore x=y^2

y=√x

16=4^2

when y=9, x= y^2, then

x= 9^2

x= 81