Ambiguous wording on questions, horrible interface, overall terrible learning experience. An absolute slog to try and figure out what goes wrong with a question, and in the end the problem is usually a misleading or confusing wording that makes everything feel more like a trick question you have to brute-force through, than helpful practice. You'll be answering questions by drawing on a graph, it'll hit all three of the points question is looking for - wrong, says Pearson. Shows the "correct" answer - it's identical to what you drew. It outlines three pieces of criteria you have to meet for an accurate answer - it hits all three, but is still wrong in comparison to the identical line they are referencing that hits all the same points.