The only logical answer would be A. Here's why.
Alex rented a movie for a total of 3 days. He paid 6 dollars total to rent it. The y-axis is defined in dollars, so if you add the values on the y-axis, it should equal 6.
This narrows the choices down to A and D.
The reason why you can eliminate D is because the graph starts at two days and skips days in between, which makes no sense in regards to the question. How would you skip days if you have a movie rented?
