Question

What relations are functions?

Answer 1

Answer:

all

Step-by-step explanation:

because they all got x and y

Answer 2

Answer:

A and C

Step-by-step explanation: cause of that rule that says there is only one output for every input also for graphs you can use see if there are two points on a line then its not a function that's why D isn't cause there are two on X axis (2,-1) and (2,1) :))