Question

Which of the sets of ordered pairs represents a function? a = {(−5, 5), (−2, 2), (2, −2), (5, −5)} b = {(4, 2), (3, −2), (9, 4), (11, −3)} only a only b both a and b neither a nor b

Answer 1

Both A and B

Explanation:

Because for every input value there is exactly one output value

Answer 2

I think this is for a online school test, I suggest mastering the skill before moving on, a hint would be
a function is a input that has one Y output
f(2) = 4x+2
f(2) = 4(2) + 2
=8 + 2
= 10