Question

If y varies directly as the x^2 and y = 448 when x = 8, what is the value of y when x = 9?

a 567
b. 72
c. 504
d. 56​

Answer 1

567

Explanation:

Answer 2

a. 567

Explanation:

from the first statement, y=kx^2

k=y/x^2

when x=8, y=448,

k=448/8^2

k=7.

thus when x=9, k=7,

y=7*9^2

y=567