Lets set up a ratio!
17.00USD per 51 pounds and 1 pound per x dollars.

next step. cross multiply for the answer :)
He could have put that they are the same shape for A and B but they are flipped around
Answer: correct answer is B
Step-by-step explanation: I know this because for example if you run one mile it will take you less time than it would if you walked 1 mile