Graphing calculator basics Helpful tips for using the TI-84 graphing calculator Designed by Karen Stanford, M.ED.

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Presentation transcript:

Graphing calculator basics Helpful tips for using the TI-84 graphing calculator Designed by Karen Stanford, M.ED

Exponents Use the x² key for squaring numbers Example: Type 4x² Enter Calculator screen looks like this: 4² 16 Use the Ʌ key for other roots Example: Type 2 Ʌ 3 Enter Calculator screen looks like this: 2³ 8 Note: After entering the exponent hit the right arrow key to move back to the base line

Changing a decimal to a fraction Math key Use the Math key for converting decimals to fractions Example: Type.008 Math 1:Frac Enter Enter Calculator screen looks like this:.008 MATH MATH NUM CPX PRB 1: 1: ˃ Frac.008 ˃ Frac _͟͟1__ 125

Graphing equations Y= key Graph key Plot1 Plot2 Plot3 Y1= 9x -13 Y2= Use the Y= key and Graph key for graphing equations Example: Type Y= 9x – 13 Graph Calculator screen looks like this: Note: For more than one equation enter the next equation on line Y2=

Finding the intersection 2 nd key Trace key Use the 2 nd key and Trace key for finding the intersection of two equations Example: Graph the two equations Type Y= 2x – 5 then move the arrow down to Y2= and type x² - 10 Graph Type 2 nd Trace 5: intersect Enter Hit Enter 3 more times and you will see the word Intersection in the bottom left corner Calculator screen looks like this: Intersection X= Y=

Window settings Window key Use the Window key to change the settings of the viewing window Example: Type Window and use the arrow keys to change the numbers for the settings then graph Calculator screen looks like this for the standard setting: WINDOW Xmin= -10 Xmax= 10 Xscl= 1 Ymin= -10 Ymax= 10 Yscl= 1 Xres= 1 Note: Type Zoom 6: Zstandard Enter to return to the standard setting

Using the table of values 2 nd key Window key Graph key Using the 2 nd key and Window key with the 2 nd key and Graph key for viewing a table of values Example: Enter the equation Type Y= x² -2x + 3 Type 2 nd Window then enter any starting value for TblStart and enter the increment for ΔTbl Enter Type 2 nd Graph to view the values for x and y Calculator screen looks like this: TABLE SETUP TblStart= 3 Δ Tbl = 1 Indpnt: Auto Ask Depend: Auto Ask X345X345 Y

References Picture of graphing calculator retrieved 2/12/14 from Instruments-TI-84-Plus-Silver-Edition-YELLOW- Graphing-Calculator-/