cas instructions
DESCRIPTION
Using the ti-nspire. Some help with button selections.TRANSCRIPT
Getting Started with TI-nspire CAS version 1.6
e move to next field / e go to last screen
a mouse pointer / a grab
b options for each application / b select single menu
d remove menus and dialogue boxes / d undo the last step
/ ▲ display page sorter / ◄ display Previous page / ► display Next page / ▼ display page sorter from My Documents
c (home) select application / c open File menu
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. (backspace) delete a character / . delete a line or object
k (catalog) display the catalog / k display the symbols
h (variable)list of variables / h store or link a variable / standard
shortcut keys apply: / C − copy / V − paste / X − cut / Y − redo / Z − undo
large black keys operators and functions
small green keys l h b t k
/·approximate answer
/pdisplay a
fraction
/rdisplay the templates
large white keys numeric keys
small grey keys symbols and punctuation
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Open a Calculator application and try the following examples Menu examples Screen Press b > 1:Actions
Press b > 2:Number
Press b > 3:Algebra
Algebra
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Open a Graphs & Geometry application • Enter the equation f1(x) = x2 − 4 • Press · to graph the equation • Press d to move the cursor
from the Graph Entry Line to the Graph Window
• Use the NavPad to move the cursor in the Graph Window
When in the Graph Entry Line, use the up and down arrows on the NavPad to select different functions
• Use the NavPad to place the
cursor over one end of the parabola
• Press the a key for a few seconds or press / a to activate the hand
• Drag the end of the parabola using the NavPad to dilate it
• As the parabola dilates, the
equation changes accordingly To return to the Graph Entry Line, press e or use the NavPad to move the cursor over it and press the a key.
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Window settings and Function Tables Press b > 4:Window > 1:Window Settings
Amend the window settings to suit
Press b > 2:View > 9:Add Function Table
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View the graph and the function table in two screen format. Press / Z three times to remove the function table and return to the graph screen.
Geometry
Press b > 1:Actions > 5:Delete All or open a new Graphs&Geometry application. Press / G to turn off the Graph Entry Line Press b > 4:Window > 6:Zoom − Quadrant 1
Press b > 8:Shapes > 2:Triangle
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Use the NavPad to move to three different points, pressing · or the a key each at each point to draw a triangle.
Press b > 7:Measurement > 1:Length to access the Length measure tool.
Use the NavPad to move the cursor over the perimeter and press the a key to highlight it. Press · or the a key to display the value of the perimeter.
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Press d to cancel the measure tool. Press b > 1:Actions > 4:Attributes
Use the a key to select the length measurement. Use the left arrow on the NavPad to reduce the number of decimal places to 1. Press ·.
Press b > 1:Actions > 6:Text and select one of the points of the triangle. Label this point ‘p’ and press ·.
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Press b > 1:Actions > 6:Coordinates and Equations. Select point p then press · or the a key twice to display the coordinates of the point. Hint: move the cursor to an appropriate location on the screen before pressing · the second time.
Use the b > 1:Actions > 3:Attributes to round off the x and y values of the coordinates to one decimal point.
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Open the Lists & Spreadsheet application. Press b > 1:Actions > 2:Resize > 1:Resize Column Width
The right and left arrows on the NavPad can be used to widen or reduce the column width. Press · to set the width.
Move the cursor to the top row of the first column and type the word ‘time’ next to the letter A. Move to the top of column B and type the word ‘distance’..
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Enter in the numbers from this screen into the first two columns.
Press b > 4:Statistics > 1:Stat Calculations > 3:Linear Regression(mx+b)
In the dialogue box, use the down arrow to select ‘time’ in the X List and ‘distance’ in the Y List. Use tab to move to the next field. Press enter twice when finished.
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The results will appear in columns C and D. Widen or reduce the column widths to suit.
Open a new Graphs & Geometry application. Press b > 3:Graph Type > 4:Scatter Plot.
Use the NavPad to select ‘time’ in the x field and ‘distance’ in the y field
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Press b > 4:Window > 9:Zoom – Data to display the points
Press b >3:Graph Type > 1:Function. Scroll up through the functions to find the equation of the least squares regression line and press · to graph it.
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Notes application The menus
Open a Text application Press 1:Templates > 1:Q&A
The question and answer template will be displayed.
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Open a Data & Statistics application Points will appear if you have previously entered values in the List & Spreadsheet application.
Refer to the earlier data in the Lists & Spreadsheet application or recreate it.
Move the cursor over the bottom box titled ‘Click to add variable’, press · or the a key and select ‘time’.
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The data points in the ‘time’ column will be displayed.
Press b > 1:Plot Type > 2:Box Plot
The box plot will be displayed. Information about the key points on a box plot will be displayed as you move the cursor over them. Grab and drag these key points on the screen. Notice that as the box plot changes shape, the corresponding values in the List & Spreadsheet application change as well.
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Move the cursor to the left side of the screen until the message ‘Click to to add variable’ appears. Press · or the a key and a list will appear. Select ‘distance’.
The plot type reverts to a dot plot and the points are displayed.
Press b > 4:Analyse > 2:Add Moveable line
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A line, with its equation, appears on the screen. Grab and move the line around the screen to see if you can find a good line of best fit.
Press b > 4:Actions > 6:Regression > 1:ShowLinear (mx+b)
The linear regression line appears on the screen. Drag the moveable line around the screen and try to fit it onto the regression line.
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