Which function represents this graph? A f(x)==x-2
B f(x) = -x-2
C f(x)=-4x? - 2
D f(x)=4x-2

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?