Is this a function or not a function

You can determine if something is a function or not by seeing if each input (or x value) has no more than 1 output (or y value). If there are 2 outputs for any one input, then it is not a function.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0