Basics TInspire

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Basics TI-nspire

• For brand new users

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Intro

• The TI-nspire is more computer than calculator.

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Goals

• Today, we will cover how to accomplish College
  Algebra calculations and graphs with the
  TI-nspire
• If we have time, we can discuss some things that
  set apart the Nspire from the older calculators.

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First time turn on

• If prompted to set up the calculator, do so now.
• To move between fields use
• Use arrow or to alter field values
• Press the center click key to select a
  field value
• When all fields are set, tab to and click

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The Home Screen

• Press
• To see the computer side of the Nspire, click on
  My Documents

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My Documents

• Files are ordered in folders.
• First, create a new folder
• Type in the name for your folder and
• Next, create a new document

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Saving Documents

• is the short cut to save
• Select your folder
• Name your file
• Highlight and press

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Page View

• Problem number Page number
• Type a note that says
• 1.1 states Problem1.Page1

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Editing Notes

• To highlight text shift arrow
• highlights to beginning of
  line
• highlights to end of line
• highlights 1
  character at a time
• Keyboard shortcuts
• copies text
• pastes text
• cuts text
• undoes your prior action
• Copy and paste your text in the next line, then
  edit it so that it says
• 1.2 states Problem1.Page2

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Inserting a New Page

• is the shortcut to insert a new page
• This time add the Calculator
• (Press )

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Fractions vs Decimals

• Try the following
• 52
• (5/2) 3 (Use the button)
• Try using the fraction template
• switch fields by using the key.
• If you want a decimal answer, use
• or put a decimal in your entry.

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Exponent Fields and Evaluations

• Evaluate 5(x4)37 for x3
• Values may be stored into variables by using
• Using requires using the
  key to move out of the exponent field.
• Simplify 647-(x-2)
• Stored values apply through all pages of a
  single problem. Stored values do not carry over
  to new problems.

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Test Relations and Templates

• Is -.4 lt -.6?
• Find ? ?(3) 2 ?
• The absolute value is in the Template menu. To
  access the Template menu, press

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Scientific Notation

• Write 5.729x10-4 as a decimal
• Write 530000000 in scientific notation
• To switch to Scientific Notation
• Go to Tools
• change Exponential Format to Scientific
• These changes only apply to the open document.
• To see Scientific notation place a decimal in
  your entry.

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Working with Roots

• Find the fourth root of 16
• Will TINspire calculate ?(2) ?(8)
• as 3?(2)?

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Graphing

• To learn the Graphing application, lets add a
  new problem to our document
• Graph yx1
• After typing in x1, hit twice to move to
  the graph work area.

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Hiding the entry line

• To have more space on the graph work area, hide
  the entry line
• To show the entry line again, use the same key
  sequence.

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Changing the Viewing Window

• There are several ways to change the viewing
  window, here is one
• Change your window to show
• x -5,5
• y -3,4

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Finding x-intercepts, Local Maximums and Minimums

• These graph points are found using points
• Move the cursor over the graph then when the
  pencil appears press
• Grab the point (Move cursor until hand is over
  point then press and hold the click key or
  press control click )
• and move it towards a point of interest until
  one of the following appears
• z for x-intercept
• M for local maximum
• m for local minimum
• To show more or fewer decimal places, hover the
  cursor over the coordinate until it flashes, then
  hit the for more, and for fewer.

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Practice with Max and Mins

• Clear your graph
• Graph yx3 x2 ? 4x 1 and label both the
  local max and the local min.
• Remember to use to move between the entry
  field and the graph work area.

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Finding Intersections

• Add a second graph yx1
• Add a point, but this time, make it an
  Intersection Point
• Move cursor over 1st graph move cursor
  over 2nd graph
• Press Esc to exit intersection points.

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Adding a Function Table

• is the shortcut to add a table of
  values to a graph.
• To alter table settings
• To remove the table is more complex

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Complex Numbers

• ? ?(?1)
• ?(?1)
• Calculate (5-2i)(33i)
• Calculate 4i (3-5i)
• Calculate (74i)/(2-5i)
• Calculate ?(?4)
• We have to change our document settings to work
  this one
• Change Real to Rectangular

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Linear Regression

• First, create a new problem using the Lists and
  Spreadsheet Application
• Some short cuts that help
• moves the cursor to the first entry in a
  list
• moves the cursor to the last entry in
  a list

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Entering Data

• Move the cursor to the very top of column A and
  name it xvalues
• Move the cursor to the very top of column B and
  name it yvalues
• Move the cursor to the first cell of column A and
  enter the x values 1,2,3,4,5
• Move the cursor to the first cell of column B and
  enter the y values 2,4,5,9,10

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Running the Regression

• Create a new Page using the Calculator
  Application
• Run the linear regression
• Look at your residuals
• Stat resid

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Regression Graphs

• Create a new Page using the Graphs and Geometry
  Application
• First, graph the data
• Enter list names for x y
• Next, fix the viewing window
• Lastly, add the regression line
• 
  

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Predict y-values

• Graphically
• Tab to graph work area
• use the up or down arrow until the cursor is
  on the regression line. Use the left or right
  arrows to trace.
• Or, you could insert a function table

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Predict y-values

• Algebraically
• Return to the calculator page in this problem
• Evaluate f1(2)
• f1()

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Matrices

• Create a new problem using the calculator
  application
• Define A 3 -1 2
• 0 1 3
• Define B 1 1 2
• 0 -1 1
• 3 0 3
• Calculate AB

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Matrix Math

• Find ?B ?
• Define C 5
• 5
• 5
• Augment (B,C)
• And solve BxC by finding the reduced row
  eschelon form for the augmented matrix.
• Confirm the solution by calculating B-1C
• 
  

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This Power Point is available

• At iws2.ccccd.edu/sfoster
• Along with the power point are some other good
  references.
• Thank You!