Question

PLEASE HELP

Variable y varies directly with x2, and y = 196 when x = 7.
Enter the constant of variation in the quadratic variation equation.
y = x2

Answer 1

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