nspire--ipadapptutorial--point slope form
TRANSCRIPT
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TI-Nspire App Tutorial
The Point-Slope Form
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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.
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Create a Graph Window
Click on the + tool to activate this menu.
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Deactivate the Keyboard
By default the keyboard is active. Click on the Keyboard button to deactivate it.
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Select the Geometry Tools
Click Menu. Then select Geometry > Points & Lines > Point.
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Place One Point Onscreen
Click anywhere onscreen to place the point.
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Display the Coordinates
Press once on the point. Then press again to bring up the Coordinate option. Select it to display the coordinates.
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Display the Coordinates
The coordinates on your screen will likely differ from the ones shown here.
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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.
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Link the Coordinates
Link the x-coordinate to variable x1. Press Enter.
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Link the Coordinates
Repeat with the y-coordinate. Click twice on it to bring up the Store option.
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Link the Coordinates
Link to the variable y1. Press Enter.
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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
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Create a Slider
Click on Insert Slider.
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Configure the Slider
Configure the Slider as shown. This Slider will control the slope in the Point-Slope Form. Press OK.
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Move the Slider
Press twice on the Slider to activate the Move option. Select Move.
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Move the Slider
Position the Slider in the location shown.
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Input the Point-Slope Form
Press the + sign in the upper-right-corner of the screen to bring up the Function Entry line.
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Input the Point-Slope Form
Input the function shown. This is the Point-Slope Form, linked to the variables you stored. Press Enter.
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Graph the Point-Slope Form
The graph shown has the slope defined by the Slider and crosses the point you created.
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Manipulate the Slider
Changing the values on the Slider will create a new graph, but it will still intersect the point.
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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.