Here is a graph representing the relationship in question 3. Interpret the set of coordinates (30, 7).
children's tickets sold
60
55
50
45
40
30
25
20
5
(30, 7)
10 15 20 25 30 35 40
adult tickets sold
O 7 children's tickets and 30 adult tickets were sold
O 30 children's tickets and 7 adult tickets were sold
O When 7 tickets are sold, $30 is collected
O (30, 7) is not a possible solution