Comprehension Passage
Directions: The graph shows the production of cars (in hundreds) over the span of a few years. Study the graph and answer the following questions.
What is the ratio between the number of cars produced in 1980 and 2010 together and the number of cars produced in 1990 and 2000 together?
1
1 ∶ 1
2
2 ∶ 1
3
4 ∶ 1
4
3 ∶ 1
5
1 : 3