Question

Variable y varies directly with x2, and y = 196 when x = 7.

Enter the constant of variation in the quadratic variation equation.
Please! I really need help

Answer 1

`y=kx^2`
k - a constant


`y=196 \ when \ x=7 \\ 196=k * 7^2 \\ 196=49k \\ (196)/(49)=k \\ k=4 \\ \\ \boxed{y=4x^2}`