Which of the following are functionsa. [(-2,3)], [(-1,5)], [(0,7)], [(1,9)]b. [(-3,3)], [(3,3)], [(0,0)], [(1,1)], [(-1,1)]c. [(-2,5)], [(-1,4)], [(0,3)], [(-1,2)], [(-2,1)]

Both A and B represent functions, as the same x value is not used twice.

However, with option C, the x value -2 is used twice, and thus it is not a function.

its c or d   take a lucky guess my dude

what graph

step-by-step explanation: