I wondering if I was doing this right.
Yes, you're doing it right.
All the y-values will just be 3 * X^2.
Yes, just label your x, y axis. Then add arrows to the ends of the curve to show that the curve continues beyond what you've plotted.
Thanks guys :D
Additionally, you'll find that later on you won't be writing down every single integer (1, 2, 3, 4). Only those that are relevant to the plotting (1 and 3). Or else you'll end up writing down too many values, which is uncomplimentary to the fact that your graph should be just a rough sketch in the first place.
Separate names with a comma.