SOLUTION: if y varies directly as the square of x and y= -27 when x=3, find y when x is 6

Algebra ->  Linear-equations -> SOLUTION: if y varies directly as the square of x and y= -27 when x=3, find y when x is 6      Log On


   

Question 204296: if y varies directly as the square of x and y= -27 when x=3, find y when x is 6
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
"y varies directly as the square of x " means that y=kx%5E2 where "k" is a constant. So simply plug in x=3 and y=-27 to find "k" first. Once you have "k", you can use the value of "k" and x=6 to find "y"