Determine which set of ordered pairs is a function.
A.
{(–1, 3), (1, 4), (–1, 5)}
B.
{(5, 3), (–6, 3), (–2, 4)}
C.
{(0.5, 1.6), (1, 1.75), (1.5, 2.3), (0.5, 3.6)}
D.
{(1, 2), (–5, 4), (3, 6), (–5, 2)}

Question

Determine which set of ordered pairs is a function.
A.
{(–1, 3), (1, 4), (–1, 5)}
B.
{(5, 3), (–6, 3), (–2, 4)}
C.
{(0.5, 1.6), (1, 1.75), (1.5, 2.3), (0.5, 3.6)}
D.
{(1, 2), (–5, 4), (3, 6), (–5, 2)}

anonymous · Answer

A relation is a function if and only if each x value has no more than one y value. For example, look at A. There are two points that have -1 as an x value. So this relation is not a function since two different points have the same x coordinate.

jdoe0001 · Answer

http://openstudy.com/study#/updates/51e986a3e4b0d999840eaf4e

anonymous · Answer

this is hard i just really need the answer lol sorry im in summer school and im at 60% and i need to get to 90% by thursday

jdoe0001 · Answer

you need to get 90%, or you want to "learn" 90%?

anonymous · Answer

Just giving the answer won't help you though. Learning the material will help you much more.

In order to be a function, each x value must have one y value at most. So, for choice A, this is untrue since there are (-1,5) and (-1,3)

jdoe0001 · Answer

we know the answer, but I don't see how that "helps" you

anonymous · Answer

actually i meant i need to get to 100% by thursday and it helps because ill never learn this stuff its hard for me