You were on the right track.
210 - 48 = 162
162/3 = 54 dimes
Answer: C
Because it fails the vertical line test.
Put a pencil vertical on the graph.
Drag it along, if there are 2 lines that touch the pencil, it fails the test.
If there's only one, it passes.
Answer:12.5
Step-by-step explanation:there you go