Question

Do the following set of points represent a function?Explain your answer (2,3),(3,8),(-1,4),(1,8)

Answer 1

Yes.

Explanation:

It is a many-to-one function. Both 3 and 1 map to 8.

2 maps to to 3 and -1 maps to 4 which is one-to-one.

There are no one to many mappings so it is a function.

Answer 2

Yes.

Explanation:

Yes.

To have a function, you cannot use the same value for an x-coordinate more than once. Here, each value of an x-coordinate is used only once, so it is a function.