Question

Choose "function" or "not a function" for the problem. {(39)(6,5)(3), (12. 2)} not a function cannot tell from the given representation function

Answer 1

Ok, seeing the data you have to know that those are points in a plane

You notice that every point is represented by (x,y)

Putting the points in the plane:

Seeing the graphic and knowing that a function have the caracteristic that when drawing a line vertically there cannot be two points that pass through that line the answer is:

Is not a function