Complete the table. In the row with x as the input, write a rule as an algebraic expression for the output. Then complete the last row of the table using the rule.

Input Output

Tickets Cost($)

2 70

7 245

9 315

x ?

10

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?