Question

Determine which relation is a function.

A.
{(–4, 3), (–2, 3), (–1, 2), (2, 5), (3, 2)}

B.
{(–4, 1), (–2, 3), (–2, 1), (–1, 5), (3, 2)}

C.
{(–4, 1), (–2, 3), (–1, 2), (3, 5), (3, 2)}

D.
{(–4, 1), (–2, 3), (–1, 1), (–1, 5), (3, 2)}

Answer 1

please help if you can

Answer 2

A function will not have 2 or more x values that are the same. They can have 2 or more y values that are the same, just not the x ones.
Now look at your points....they are set up like this (x,y)
Look at all the x values....which one has no repeating x values ?

Answer 3

For instance, look at D....it IS NOT a function because 2 of its x values are -1 and a function cannot have 2 or more x values the same.