Question

Variable y varies directly with x2, and y = 72 when x = 6.



What is the value of y when x = 4?



y =

Answer 1

@dtan5457

Answer 2

y=k(x^2)

y=72
x=6

72=k(36)

What is k?

Answer 3

2?

Answer 4

Yes. So k=2.

What is the value of y when x = 4?

y=2(x^2)

x=4

y=2(4^2)

y=2(16)

y=?

Answer 5

32?

Answer 6

yep

Answer 7

Yay! so y=32?