20070201
10-1-8
eActivity Overview
6. Graph the expression using the Graph strip.
1. While the “Graph draw” Graph strip you created in step 5 is selected, press w .
• This will display a graph screen.
2. Press !6 (G ↔ T) to display the Graph Editor screen.
3. In line Y1, input the function ( y = 2 x
2
+ x – 3) you want to graph.
4. Press 6 (DRAW) to graph the function.
• This will display a graph screen. Since the graph intersects the x -axis at –1.5 and 1,
we can conclude that the solution ( x = 1) obtained in step 4 is valid. The –1.5 value
was not included as a solution because we specifi ed a lower limit of 0.
• The graph drawn here is stored in the strip we created in step 5 .
5. To return to the eActivity workspace screen, press ! a ( ' ).
7. Use G-SLV to extract the roots on the graph screen.
1. Select the Graph strip we created in step 5 , and then press w .
• This will display the graph screen and draw the graph we drew in step 6 .
2. Use G-SLV to extract the roots of y = 2 x
2
+ x – 3.
!5 (G-SLV) 1 (ROOT) ....(Extracts fi rst root.)
e ..........................................(Extracts next root.)
• For details about using G-SLV, see page 5-11-9.
3. To return to the eActivity workspace screen, press ! a ( ' ).
8. Save the eActivity fi le.
• Press 1 (FILE)1 (SAVE) to save the fi le. This will save the fi le you are editing by
replacing the currently stored version (if any).
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