what is the function rule for (0,0), (1,3),(2,3)(3,9),(4,12)

Question

i need alot of help i have no clue how to find the function rule plz giv me the function 

Answer 1

X |  Y = f(x)

_____

0  |0

 1 |3

 2 |3

 3 |9

 4| 12

 

A function is an "x" that you plug into to get a y or f(x). Are you sure there isn't a typo as (2,6) and the function is y =3x? Because otherwise there can be no function. A function can have a vertical line pass through it at most exactly once. This is called the vertical line test. A function that has an inverse has a horizontal line pass through it at most exactly once on all points.