1. To find the yintercept:
Hit , #5 TRACE, #1 Graph Trace. The spider will start on the yaxis,
showing the yintercept. 

2. To find the xintercept:
The xintercept of a graph is also known as the "root" or the "zero" of the function.
Press MENU  #5  #1 to TRACE the graph.
Use the NavPad to move the trace point to the xaxis. As you approach the xaxis, the spider will "jump" to the zero location. When the appears, you have found a zero of the function.
Read more about Zeros. 

3. To find where the graphs intersect:
A second graph is plotted .
Press MENU  #6 Points & Lines  #3 Intersection Points
When the pointing hand appears, click on each graph
and all intersections points will be found.
Read more about Intersection Points 

4. To find a specific value while tracing:
To "jump" to a certain xcoordinate on the screen,
press MENU  #5 Trace  #1 Graph Trace  Enter.
Now, simply type the xcoordinate that you desire.
The ordered pair will appear and the spider will be located at the closest plotable point.
If you choose a value out of the current viewing window, the graph will adjust to include your new point.
For this graph, the xcoordinate 22 was selected. Notice the dotted line indicating the location on the xaxis as well as the ordered pair (22,8).

Up and down arrows will move between functions. 
5. Controlling what the graph looks like (attributes):
Be sure the command line is referring to the graph you wish to alter.
Press to move along the options on the command (entry) line.
The is the Hide/Show button.
The is the Attribute button. The attributes appear below. 

Line Weight: Thin,
Medium,
Thick 
Line Style: Solid, Dashed, Dotted 
Label Style: y =, f( ), f( )=, y = f( ), f 
Continuous or Discrete 

