Question

Y varies directly as the square of x when x=2 then y =16 find y when x=8

Answer 1

Answer:   y= 64  

Step-by-step explanation:

If y is 16 when  x is 2  This means if  x is 8 y will be 64.

Set up the proportional equation

$\frac{2}{16} = \frac{8}{y}$     Cross multiply  

2y = 128

y= 64