Two sets and are shown below, along with their Cartesian product A×B as an array of circles, and a mapping f from A to B, with each filled circle signifying a value of f.
Instructions: Click “Show Answer” to check your work.
At any time you may switch between images and preimages, change the number of elements in A or B, or generate a new mapping.
Grading: Correct choices (1 point each) are shown in green, incorrect choices (-1 point each) are red. Each “round” is worth either 5 or 10 points, depending how many choices are available.
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