Which is the quadratic variation equation for the relationship?

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

A.
y = 4x2

B.
y = 2x2

C.
y = x2 + 25

D.
y = 12x

Question

Which is the quadratic variation equation for the relationship?

y varies directly with x2 and y = 72 when x = 6.
 
 
 A.
y = 4x2
 
 B.
y = 2x2
 
 C.
y = x2 + 25
 
 D.
y = 12x

anonymous · Answer

attachment

anonymous · Answer

@Hero  @linn99123  help please

linn99123 · Answer

i can try but idk if ill be 100% right gimmie a min okay hun?

anonymous · Answer

okay im thinking d take your time thanks for the help!

hero · Answer

If y varies directly with x^2, then the formula to represent this relationship is 

y = kx^2, where k is the constant of proportion. 



In this case, you are given x = 6 and y = 72, and expected to solve for k. 
72 = k(6)^2

Once you solve for k, you only need to input the value for k into the formula y = kx^2.