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Everything you ever wanted to know about your TI graphing calculator… …but were afraid to ask!

Everything you ever wanted to know about your TI graphing calculator… …but were afraid to ask!. We will use the TI-83/84 graphing calculator as a tool to: make complex calculations, visualize concepts, and perform data analysis. Getting to know your TI:.

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Everything you ever wanted to know about your TI graphing calculator… …but were afraid to ask!

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  1. Everything you ever wanted to know about your TI graphing calculator… …but were afraid to ask! • We will use the TI-83/84 graphing calculator as a tool to: • make complex calculations, • visualize concepts, and • perform data analysis.

  2. Getting to know your TI: When you first turn on your TI, you will see the homescreen – this is where we will perform basic calculator operations. graphing functions access blue (TI-84) or yellow (TI-83) features arrow keys (move cursor) If you are lost, QUIT AND GO HOME! access alpha features variable key standard calculator keys = / select catalog of all operations Using Your TI 83/84 Graphing Calculator – Part I

  3. Calculator Basics: • Turn the calculator [ON] • Turn the calculator [2nd][OFF] • Your TI has an automatic power-off after 5 minutes of inactivity. • When this happens, your data will be saved for future use. • Access your product number and ID [2nd][MEM] • product #: • ID: • Adjust the contrast to darken • [2nd][5] • Adjust the contrast to lighten • [2nd][6] Before we proceed, check your default settings in [MODE]. We want the left-most settings. Murphy’s Law: If your batteries go dead, it will happen during an exam – carry an extra set of AAA batteries in your backpack! Using Your TI 83/84 Graphing Calculator – Part I

  4. Homescreen Basics: • Multiplication can be performed three ways: • (Press enter to view the answer.) • 13 [x] 57 • This will show as * on screen • 5(12+7) • We will use ( ) to maintain the order of operations • Implied multiplication using variables or defined constants • Storing and using a stored value for x: • #[STO][ ][ENTER] • Now we can evaluate 27x-9 for the stored x-value The homescreen has 8 lines with 16 characters per line. The text will scroll from one line to the next – this will not effect your calculations. Using Your TI 83/84 Graphing Calculator – Part I

  5. Homescreen Basics: • Squaring and exponents • is entered as 7[ ]2 • MUST be entered using ( )s • other exponents can be entered • using the carrot key: 3[^]4 • MUST be entered using ( )s • Roots/Radicals • square roots: is entered as [2nd][ ]144 • cubed roots: is entered as [MATH][4:][ENTER]64 • other roots: is entered as 6[MATH][5:]64 • Use parentheses to evaluate Press [ENTER] to view the answer. Be sure to get in the habit of closing your parentheses. Using Your TI 83/84 Graphing Calculator – Part I

  6. Homescreen Basics: • Negate key [(-)] vs. subtract key [-] • Evaluate • Using the subtract key for BOTH will subtract 7 and 12 • from our last entered-answer • To view/recall and use your last • entered answer hit [2nd][ANS] • Absolute value • is entered as [MATH][NUM][1:abs]5[-]16 • Evaluate Remember that you have a catalog of operations. Using Your TI 83/84 Graphing Calculator – Part I

  7. Homescreen Basics: • You will often need to use ( )s to maintain • the order of operations. • Evaluate • To change the answer to fraction form, press [MATH][1:] • To change the answer back to decimal form, press [MATH][2:] • To find the least common multiple or lowest common denominator: • To find the LCD for press [MATH][NUM][8:]18[,]24 • You can enter more numbers, but separate lists of numbers with comas. • To find the greatest common factor: • To find the GCF for 48 and 72 press [MATH][NUM][9:]48[,]72 Press [CLEAR] to clear a line – Press [CLEAR] a second time to clear the entire homescreen. Using Your TI 83/84 Graphing Calculator – Part I

  8. Homescreen Basics: • Let’s square -13 • Then take the absolute value of -17 – 65 • Take the 5th root of -32 • Now evaluate • …whoops! That should have been • Press [2nd][ENTRY] to recall the last entered expression. • Now, just arrow over make respective changes: (we will go left to right) • Press [DEL] to delete a highlighted character • Overtype to make changes • Press [2nd][INS] to insert in front of the cursor • Press [2nd][ENTRY] multiple times to access previous expressions If you get an error [ERR] – select [2:Goto] and the TI will highlight the error that you need to fix! Using Your TI 83/84 Graphing Calculator – Part I

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