Thread: Problems creating linear table

I'm attempting to create a table with these values y=3x,y=3x^2, and y=3^x
With values of X from 0to5. I have an example of a table in which I'm trying to replicate, though with these functions. Hopefully, someone can help me understand the difference in values with these functions. I don't get it

Y=2x

X Y First difference
0 0
1 2 2-0=2
2 4 4-2=2
3 6 6-4=2
4 8 10-8=2
5 10 12-8=2
6 12 12-10=2