Will give Brainliest! The Math Club at North High School decided to have a car wash to raise money for expenses related to math competitions. The graph below shows the relationship between cars washed and earnings (in dollars). What is the domain of the graph?
-20 ≤ y ≤ 40, where x ≥ 0
-20 ≤ y ≤ 40, where y is all integers
0 ≤ x ≤ 12, where x ≥ 0
0 ≤ x ≤ 12, where x is all non-negative integers