Question

WILL MARK BRAINYIEST!!!

Determine whether each relationship is a function. Explain.
{(5,2), (-2, 15), (-7,15), (1,5), (4,15),(-7,2)}

Answer 1

This is not a function because functions cant have 2 point that share an x value(having two outputs) . -7 is used twice.
I believe this is called the vertical line theory

Answer 2

This relationship is not a function because -7 has 2 outputs(2 and 15).
In a function, each input has to have exactly one output.