Select ALL sets that are functions: (-2,1), (0.5), (-6, 4), (-2,3)
(-6, 4), (8,3), (2, 2). (10,-5)
(-2,1), (0.5), (-6, 4), (-2, 1)
(5, 16), (6, 20), (7, 25), (9, 10)

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

Identify the number as a rational or irrational.explain. 127

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2