Question

Graph the quadratic variation if g(x) varies directly with x2, and g(x) = 50 when x = 5.

Answer 1

y varies directly with x^2 means that there is a constant k, so that the equation for this thing would be y=kx^2.

Answer 2

now plug in the coordinates where x=5 and y=50 and solve for k. Then you can plug in x's and y's for the given graphs and see if they represent the equation. Hope this helps.