Question

Which relation is a function?

{(0, –9), (–9, –2), (0, –3)}

{(0, –9), (–9, 0), (–3, –3)}

{0, –9, –2, –3}

{(0, –9), (–2, –3), (–2, 0), (–3, –2)}

Answer 1

@dude if there are 2 x values in a relation, is it a function or not?

Answer 2

If there are two coordinates with the same x value then it would fail the vertical line test

Answer 3

Does that make sense?

Answer 4

so, it's not a function if there are 2 coordinates with the same x value

Answer 5

Correct

Answer 6

can two coordinates make a function or it has to be 3 coordinates?

Answer 7

@Shadow

Answer 8

I mean in order to test if it is a function or not without a graph, you would need more than one coordinate like (x,y)(x,y)

Then based on that given information, you could make the best possible choice of declaring if it is a function or not.

Answer 9

{0, –9, –2, –3}

This just looks like a list of x or y coordinates.

Answer 10

or values I should say.

Answer 11

so, the answer is B then?

Answer 12

It seems so