SOMEON EHELP AS SOON AS POSIBLE

Question

Is the following relation a function?

x
1	4
−1	−2
3	10
5	16

A.YES

B.NO

Answer 1

Does each x value appear only once? If it does, it is a function.

Answer 2

I have a hunch that it is a straight line.....Plug the various points into the general form: y = mx + b

2 points will define m and b. then see if the other points fit