The line slants sharply down from left to right.

The line passes through the following points:

(0 comma 18)

(4 comma 10)

(7 comma 4)

(9 comma 0)

Question

The graph shows the possible combinations of the number of pounds of tangerines and lemons that could be purchased for $dollar sign 18$ at a certain store. If Melvin purchased lemons and $4$ pounds of tangerines for a total of $dollar sign 18$ , how many pounds of lemons did he purchase?

Accepted Answer

Choice B is correct. It's given that the graph shows the possible combinations of the number of pounds of tangerines, x , and the number of pounds of lemons, y , that could be purchased for $ 18 at a certain store. If Melvin purchased lemons and 4 pounds of tangerines for a total of $ 18 , the number of pounds of lemons he purchased is represented by the y -coordinate of the point on the graph where x = 4 . For the graph shown, when x = 4 , y = 10 . Therefore, if Melvin purchased lemons and 4 pounds of tangerines for a total of $ 18 , then he purchased 10 pounds of lemons. Choice A is incorrect. This is the number of pounds of tangerines Melvin purchased if he purchased tangerines and 4 pounds of lemons for a total of $ 18 . Choice C is incorrect. This is the number of pounds of lemons Melvin purchased if he purchased lemons and 2 pounds of tangerines for a total of $ 18 . Choice D is incorrect. This is the number of pounds of lemons Melvin purchased if he purchased lemons and 1 pound of tangerines for a total of $ 18 .

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