1. TI-Nspire App Tutorial
The Point-Slope Form

2. Summary
• In this tutorial, you’ll be exploring the concept
of the Point-Slope Form. The steps in the
tutorial include:
– Creating a Graph Window.
– Adding a point.
– Creating a Slider.
– Linking a function in Point-Slope form to the point
and Slider.

3. Create a Graph Window
Click on the +tool to activate this menu.

4. Deactivate the Keyboard
By default the keyboard is active. Click on the
Keyboard button to deactivate it.

5. Select the Geometry Tools
Click Menu. Then select Geometry > Points &
Lines > Point.

6. Place One Point Onscreen
Click anywhere onscreen to place the point.

7. Display the Coordinates
Press once on the point. Then press again to bring up the
Coordinate option. Select it to display the coordinates.

8. Display the Coordinates
The coordinates on your screen will likely differ from the ones
shown here.

9. Link the Coordinates
Link the coordinates to variables x1 and y1, which will
be used in the Point-Slope Form. Click twice on the x-
coordinate to bring up the Store option.

10. Link the Coordinates
Link the x-coordinate to variable x1. Press Enter.

11. Link the Coordinates
Repeat with the y-coordinate. Click twice on it to bring
up the Store option.

12. Link the Coordinates
Link to the variable y1. Press Enter.

13. Create a Slider
Click on Menu. The Points & Lines Tools are showing.
Click on the upper-left part of the menu:
Points & Tools > Tools > Actions

14. Create a Slider
Click on Insert Slider.

15. Configure the Slider
Configure the Slider as shown. This Slider will control
the slope in the Point-Slope Form. Press OK.

16. Move the Slider
Press twice on the Slider to activate the Move option.
Select Move.

17. Move the Slider
Position the Slider in the location shown.

18. Input the Point-Slope Form
Press the + sign in the upper-right-corner of the screen
to bring up the Function Entry line.

19. Input the Point-Slope Form
Input the function shown. This is the Point-Slope Form,
linked to the variables you stored. Press Enter.

20. Graph the Point-Slope Form
The graph shown has the slope defined by the Slider
and crosses the point you created.

21. Manipulate the Slider
Changing the values on the Slider will create a new
graph, but it will still intersect the point.

22. Move the Point
You can also relocate the point to a different part of
the screen, but the linked function will ensure it
intersects the point at its new location.