3.1 Drawing a Graph
If you plot a few points in a coordinate system and connect them, you get a graph. A graph usually is drawn to show a relation between values on the xaxis and values on the yaxis. We look at an example with the points (2, 0), (0, 2), (2, 4) and (4, 6). 
The points can also be put into a value table: 

We plot them in a coordinate system and connect them making a graph.



