Question

Which of the following represents a function?

Answer 1

(C), because in a function you cannot repeat any of the x factors, in all A B and D you see that they repeat a number in the x, therefore the only answer choice left is C.

Answer 2

The correct option is C.

Explanation:

Consider the provided information.

A function is defined as a relation of input and output where each input has only one possible output or Each x value is associated with only one y value.

Now consider the provided tables

Option A has two y values for x = -15. i.e 16 and 22. Thus, this is not a function.

Option B has two y values for x = -3 i.e 16 and 15. Thus, this is not a function.

Option C has only one y values for each x value. Thus, this is a function.

Option D has two y values for x = -7 i.e 14 and 15. Thus, this is not a function.

Hence, the correct option is C.