Mathematics, 04.01.2021 19:10, martinezjulio1976

The sets of ordered pairs below represent the cost to fix a plumbing issue based on the number of hours. The first coordinate represents the hours and the second coordinate the cost. Select the sets of ordered pairs that are proportional relationships.
(2.100),(4,320)(400). (8,640)
(1.30), (3,170) (4,210), (6,290)
(1.135) 64210), (6,255),(6, 200))
2.150): (3,225), (7,525), (8,600)
(230) 6275), (6,330) (735))

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