Drawing a Graph using known equations

Plotting a graph in GeoGebra using known equations is easy. Just type in the equation in the input bar at the left side of the applet and it is generated. To start, try drawing the graph for the equation y=2x+4. Next, try drawing a vertical line graph using equation x=3. Use your mouse to move the the lines around and notice the changes to the equations. Feel free to explore and write in different mathematical equations, generating different graphs.