Question

Question 2

Which set of coordinates could be points on the graph of a function?
A (-2,2), (1,1),(1,4),(2,5)
B (-1,1),(1,1),(2,2), (2,5)
C (-1,2), (0,1),(1,2), (2,5)
D (1.2). (1,3), (1,5),(1,6)

Answer 1

Explanation:

I think no. C is the answer. Please let me know by comment I am wrong or right

Answer 2

C

Explanation:

A set of coordinates is a function if and only if one input does not map onto two or more different outputs.

In other words, given (x,y), x should each have one distinct y. If an x has 2 or more y, then the y must be the same value.

Choice A:

We see that it has the pairs (1,1) and (1,4). 1 maps onto both 1 and 4, so this is not a function.

Choice B:

Again, we see that it has the pairs (2,2) and (2,5). 2 maps onto both 2 and 5, so this also isn't a function.

Choice C:

In this set, no x are repeated. Thus, this is a function.

Choice D:

In this set, we have the x repeated four times, with 1 mapping onto 2, 3, 5, and 6. Thus, this is not a function.

So, our answer is C.