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TI – 83 Plus1 A Quick Reference Presentation for AMSTI Year 1 Training

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2 Previewing Keyboard To turn on, press ON. To turn off, press 2 nd ON. To darken screen, toggle 2 nd and (up cursor). Notice the changing number in the upper right corner. The higher the number the darker the screen.

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3 Previewing Keyboard To lighten screen, toggle 2 nd and (down cursor). Notice the changing number in the upper right corner. The lower the number the lighter the screen. If the screen display must be set at 8 or higher to be visible, it is time to change the batteries.

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4 Previewing Keyboard There are many menus and embedded menus in the graphing calculator. Should you find yourself lost, you can return to the home screen by using 2 nd QUIT. ( Quit and go home).

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5 Previewing Keyboard The home screen is available for normal calculator computations. Home screen cursor is a black square. 2 nd function cursor shows a white arrow in the square.

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6 Previewing Keyboard ALPHA enters alphabetic characters (offer students a few minutes to enter a message before continuing). Do not use ALPHA to enter variables. X, T,, n enters one of the four symbols as variables.

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7 Previewing Keyboard Edit an entry using the backspace cursor, DEL, or 2 nd INS keys

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8 Clean up time – Returns display to the best settings for future work! Clean-Up Procedure Follow the triangular pattern formed by the keys: Y=, ZOOM, and MODE.

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9 Check MODE All menu items should be highlighted on the left. Clean-Up Procedure

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10 Clean-Up Procedure Clear y = This step is optional, but works well with students to get them all on the same page.

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11 Clean-Up Procedure Zoom 6 This step sets your window at a standard setting. It may be adjusted later either manually or with the Zoom feature.

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12 Optional Clean-Up Procedure Check Stat Plots off To check stat plots you must use the 2 nd key. This step is a great troubleshooter.

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13 Optional Clean-Up Procedure Format To check FORMAT you must use the 2 nd key. Highlight items on the left. This step is a good Troubleshooter, also.

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14 Zoom is used to quickly adjust the display window. Frequently used zoom keys: 2: Zoom In. 3: Zoom Out. 5: Zoom Square. 6: ZStandard Zoom

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15 Window is used to manually set the window for the best display of the graph instead of using the Zoom feature. Window

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16 Xmin and Xmax give the bounds on the x-axis Ymin and Ymax give the bounds on the y-axis Xscl and Yscl control the intervals between tick marks on the axes Xres controls how finely it is drawn and generally should be left alone. Window

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17 Trace is used to move a point along a graph, showing its x and y values. Use the up and down arrows to jump from one graph to another. Use the right and left arrows to move the point along a graph. Trace

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18 Practice Editing, Using Y =, and Graphing Press Y = Complete the equation with: – 3x x – 4 Edit the equation to: – 3x 2 + 7x + 4 Press GRAPH To view a table of x, y values for the graph, press TABLE.

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19 Practice Editing, Using Y =, and Graphing Suppose you want to prove that 3(x + 5) is not equal to 3x + 5, but is equal to 3x Type all three equations onto the Y = screen. Highlight the = on Y 3 = 3x + 15, press ENTER to toggle off the =, so that this equation will not be graphed.

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20 Practice Editing, Using Y =, and Graphing Press GRAPH. Two distinct lines are graphed, so the equations are not the same. Turn off Y 2 = 3x + 5, and turn on Y 1 and Y 3. GRAPH. Only one line appears, so the two equations are the same. Verify values by using TABLE.

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21 Stat STAT is used to enter data into lists and manipulate them.

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22 Stat To enter data into a chosen list, press STAT, highlight Edit and ENTER, or just press 1. Enter data in list 1 (L1) or use arrows to move to other lists. Formulas may be entered in lists.

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23 Using STAT to Average Grades Press STAT and then enter Edit. Under L1 list 4 student ID numbers (cannot use names). Under L2 list each students score on the first test: 84, 97, 86, 75.

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24 Using STAT to Average Grades Under L3 list 2 nd test scores: 87, 89, 95, 84. Above L4 type the averaging formula and enter: (L2 + L3)/2.

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25 Using STAT This is a great tool to use with Investigation 7 in CMPs Covering and Surrounding to derive pi. Use L1 for circumference data. Use L2 for diameter data. Enter the ratio C/D as a formula in L3. See what happens.

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26 How could each average be shown as rounded to the nearest whole number? Go to MODE and select Float 0 decimal places.

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27 Stat Plot Turn Plot on. Select type of graph. Select list(s) of data. Choose type of plotting mark. STAT PLOT is used to graph data from selected lists.

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28 Using STAT PLOT to Make Scatter Plots To clear old data: Press STAT Place cursor on List heading Press CLEAR and ENTER

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29 Using STAT PLOT to Make Scatter Plots Enter new data in appropriate lists. L1 Hours Spent Studying: 2, 1, ½, 4, 0, 3 L2 Score on Test: 87, 82, 90, 97, 64, 89

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30 Using STAT PLOT to Make Scatter Plots Display menu by pressing 2 nd and STAT PLOT Turn on Plot 1 (highlight Plot 1, Enter, highlight ON on new screen).

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31 Using STAT PLOT to Make Scatter Plots Choose type of graph (must be a reasonable choice for type of data listed). Choose type of mark Press ZOOM 9 (ZoomStat) Graph

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32 Families of Functions Use the equation y = ax + k Problem 1: Varying a Group selects one value for k for all equations in Problem 1. Each person in group selects a different value for a. Each person graphs lines on calculator and then on grid worksheet.

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33 Families of Functions Use the equation y = ax + k Problem 2: Varying k Group selects one value for a for all equations in Problem 2. Each person in group selects a different value for k. Each person graphs lines on calculator and then on grid worksheet.

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34 Families of Functions Use the equation y = ax + k Each group will make two planes on graph poster paper. The groups lines from Problem #1 will be graphed on the first plane. The groups lines from Problem #2 will be graphed on the second plane. Write the groups observation about each problem and hang the poster on the wall.

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