How do you plot a single function? For example, how do we plot y=x² ? First, select the [Y=] key, just below the screen.

Next, make sure the ranges are correct by selecting the [WINDOW] key (next to the [Y=] key).

Finally, select the [GRAPH] key to display the plot.

There are many options as far as plot style: Here are some of them

You change the plot style by moving the cursor to the left-most column and hitting [ENTER] until the desired style appears.