Question

y varies directly as the square of x. When x = 3, y = 18. What is the value of x when y = 72?

A. 6
B. 8
C. 12
D. 54

Please help!

Answer 1

its c-12. Because if you divide 72y by 18y it equals 4. Then you would just multiply that number (4) by the original x (3), and you would get 12.

Answer 2

Answer: The answer is 12

Step-by-step explanation: Because if you divide 18y by 72y it will equal 4. Then you would just mutiply that number (4) by the original x (3), and you would get 12