Question

When we are doing a table for the X and Y factors, what makes a function a function?

Answer 1

so a function is a rule law or expression that defines a relationship between one variable ( the independent variable) and another variable ( dependent variable)

Answer 2

so what make a function a function a function is an equation that only has one answer for y for every x

Answer 3

did that help

Answer 4

Every function has a Y and an X value

If one of the functions has the same X value it's not a function

for example : first pic is an example, the second pic is not

Answer 5

I know the picture is not good but I hope it explains it better

Answer 6

So for example in the second picture

The X values go to the same Y value, so it's not a function
(2 goes to 20 and 40)