In Exercises 15 to 20, for each set of ordered pairs, plot the related points. Then use the vertical line test to determine

Question

In Exercises 15 to 20, for each set of ordered pairs, plot the related points. Then use
the vertical line test to determine which sets are functions.
15. ((-3, 1), (−1, 2), (2, 3), (1.4)}
16. ((2, 2), (1, 1), (3, 3), (4, 5)

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