6. Which of the following sets of ordered pairs defines a relation? A. {(1,3), (2,3), (3,3), (4,3)} B. {(0,2), (0,3), (4,4),(0,5)} C. {(1,10), (6,-3,6,4), (7,3)} 7 D. all of the above 7. Suppose you want to call your friend by phone. The charge of a payphone call is P5 for the first 3 minutes and an additional charge of P3 for every additional minute or a fraction of it. How much will you have to pay of you have called your friend for 1 minute? 2 minutes? 3 minutes? 4 minutes? 5 minutes? Express the answers as ordered pairs in the form (time, amount). A. (1,3), (2,6), (3,9), (4,12). (5,15) B. (1,5), (2,5), (3,5), (4,8), (5,11) C. (5,1),(5,2), (5,3), (8,4), (11,5) D. (3,1),(6,2), (9,3), (12,4), (15,5) 1 8. Consider the relation represented by the mapping diagram below. Represent the relation as a set of ordered pairs. у A. {(3,-9), (2,-9), (7,-9) B. {(-9,3), (-9,2), (-9,-7)} -9 C. {(3,2), (-7,-9)} D. {(2,3), (-9,-7)} 06
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