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

translate:
determine which set of points doesn't have a repeated x-value

Answer 2

Is this the same question i answered

Answer 3

To be a function, the x values can not repeat themselves. If they were graphed, the vertical line test would help but in this case just look that it does not have a repeated x value. Repeated y values are fine, x values are not though.

Answer 4

@maurice2232