2 toy cars cost 3 dollars4 toy cars cost 6 dollars6 toy cars cost 9 dollars8 toy cars cost 12 dollarsWhat is the cost of 18 toy cars? A$12 B$20 C$22 D$27

It is $3 for every two cars. 18 cars is equal to 9 bundles of 2, 3 times 9 =27. So the answer is $27