Texas Instruments TINSPIRECX manual Spreadsheet for Data Capture, Two Scatterplots

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A Spreadsheet for Data Capture

•Open a new Lists & Spreadsheet page.

•Type column headings for columns A to D.

•Click in the function entry line in column A (grey cell just below the heading).

•From the Data menu choose Automated Data Capture. Type r and press ·. This will capture values of the radius in column A.

•Repeat for the other variables in columns B to D.

•Check that the data that appear are the same as the current measurements on the previous page.

First Steps with TI-Nspire™

Appendix: Multiple Representations

Beginning to capture data

Two Scatterplots

•Open a Data & Statistics page.

•Choose the variable diameter for the horizontal axis and circum for the vertical axis.

•So far there is only one data pair and one point for the Scatter Plot.

•Open another Data & Statistics page.

•Choose the variable radius for the horizontal axis and area for the vertical axis.

Collecting Just a Little Data

•Return to the Geometry page.

•Click and drag on the circumference of the circle to move it in and out just a little bit.

•Review the amount of data you have collected in the spreadsheet.

•Review the relationships shown on the two scatter plots.

•You may need to update the window settings using the option Zoom–Datafrom the Window/Zoom menu - b52.

Setting up a scatter plot

Data capture is under way

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© 2012 Texas Instruments Education Technology

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Contents First Steps About this document Contents Appendix TI-Nspire CX Keypad Layout TI-Nspire Documents Nothing on the screen?Memory Battery Life Charging the handheldHome Screen First Steps with TI-Nspire Tutorial 1 TI-Nspire documents Documents, Problems and Pages ScratchpadNavigating Documents First Steps with TI-Nspire Tutorial 1 TI-Nspire documents Contextual Menus Check list of some key points in Tutorial Calculator Application Basic operationsHistory Lesson Approximate CalculationsTemplates Menu of maths templatesDocument settings dialog box Effect of changed settingsGetting Set Some Algebra Ways to define variablesUse of function notation Calculator Menu Statistical Distribution TablesLists of random integers Variables Linked to Documents List of defined variablesWhy use Notes? Making NotesVarious text formatting Instructions Recording results Splitting the Screen Format sub-menuWays to split the screen You must press /e and then b Interactive Notes An inserted comment Use of proof template and symbolsMore Options from the Notes Menu Use of Q+A templateAsking Questions Check list of some key points in Tutorial Graphing Functions GraphingGraphs & Geometry Two Views Graphing ViewOpen-hand cursor Grab and Drag PracticeChanging the Axes Grabbed tick mark on the axesZoom settings Grabbed-sheet icon Editing, Deleting or Hiding a FunctionChanging f2 in the function history Trace picks out significant points Tracing GraphsPoints and coordinates Points of intersectionAnalyse Graph Menu Coordinates and labelled pointsUsing Sliders Manually Moving GraphsAlternative icons Transformed graph and equation Sequence Plotting Check list of some key points in Tutorial Two Parallel Lines GeometryView for Plane Geometry Drawing the base of the triangleWhat’s grabbable? Construct the TriangleMany options in the Construction menu Measurement menu Making MeasurementsVariables and Text Storing the measurement as a variableReady to grab a and slide it Tidying Up and Using AttributesDynamic Changes Changing the attributes of the triangleArea is now locked Unlocked/Unpinned Points B and C. Try Moving point BCheck list of some key points in Tutorial Lists & Spreadsheet Entering Data as ListsUsing Formulae Conflict resolutionOne way to enter a formula Typical Spreadsheet Actions Capturing Data Function TablesHand-made function table Simple function table Options for function tables Graph and table side by sideFrequency Charts Charts with One Variable One and Two Variable StatisticsShoe Sizes and Hand Spans Comparing Boxplots Charts for Categorical DataPie Chart displaying categorical data Upper quartile displayedCharts with Two Variables Fitting a Line by Hand and EyeReady to add a 2nd variable Drawing the Regression Line Getting the StatsCalculated regression line Statistics Calculations menu Sets of statistics Dragging on the ChartsWorking with Frequency Data Effect of moving a point from here … … to hereTexas Instruments Education Technology Check list of some key points in Tutorial Multiple Representations Draw and Measure a CircleMeasured circle Two Scatterplots Setting up a scatter plot Data capture is under waySpreadsheet for Data Capture Collecting Just a Little DataLinear relationship Go to Town with Data CollectionFit a Straight Line Moving a straight line by hand Not a linear relationshipDifferent Approach to Scatterplots RegressionBasic quadratic ready for fitting… … and dragged into place