The graph of F(x) shown below has the same shape as the graph of G(x)=x^4 -x^2 which contains the point(0,0) which of the following is the equation ofF(x)

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?