Mathematics, 04.06.2020 15:00 XVARYX

Select ALL the correct answers. Which of these relations are functions? {(-5,-7), (-2,-7), (7,17), (-5,21)} x4-47-7-4 y3-2115-5 x2-262-6 y11-52115-15

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Select ALL the correct answers. Which of these relations are functions? {(-5,-7), (-2,-7), (7,17), (...