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

2. 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.

3. 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.

4. 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).

5. 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.

6. 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.

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

8. 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.

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

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

11. 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.

12. 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.

13. 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.

14. 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

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

16. 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

17. 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

18. 18 Practice Editing, Using Y =, and Graphing Press Y = Complete the equation with: – 3x 4 + 10x – 4 Edit the equation to: – 3x 2 + 7x + 4 Press GRAPH To view a table of x, y values for the graph, press TABLE.

19. 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 + 15. 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.

20. 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.

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

22. 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.

23. 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.

24. 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.

25. 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.

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

27. 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.

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

29. 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

30. 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).

31. 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

32. 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.

33. 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.

34. 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.