TI-83 Tutorial By Mr. Yoon

TI-83 for Grade 11 Math

2 usesa) Numerical Computation

b)Graphing

Main Buttons for Grade 11 Math

Numerical ComputationExample: Compute 1) 2*7 Step 1: Push 2 button

Step 2: Push MULTIPLY button

Step 3: Push 7 button

Step 4: Push Enter Button

Numerical Example #2Example: Compute:Step 1: Push “2nd” buttonStep 2:Push the “x²” button

Step 3: Push 4&9 buttons

Step 4: Push “)” button

Step 5: Push “Enter” button

Numerical Example #3ExampleCompute:Step 1: Push “(“ , “3” , “divide”, “4”, “)”

Step 2: Push “plus” button

Step 3: Push “(“ , “5” , “divide”, “8”, “)”Step 4: Push the “Enter” button

Converting Decimals to Fractions• Using the TI-83 we can convert decimals to

nice fractions.• From our last example

Push the “Math” button

Push “Enter”

• Finally Push “Enter” again

Graphing ExampleGraphing f(x)= 2x²-7x+3*If you want to graph a functionpress the “Y=” button

*You should get a screen that lookslike

*Enter 2x²-7x+3 into this screen

Graphing Example• Enter 2x²-7x+3 by pushing“2” , “Variable”, “x²”, “minus”,”7”. “Variable”

“plus”, “3”

Push “Graph”

Graphing Example: Changing the ViewWe can change the viewing window to get better viewPush the “Window” button

Change Xmin and XmaxXmin=-3Xmax=5(Use arrow keys and

clear buttons)

Hit the “Graph” Button

Solving the equation:2x²-7x+3=0

When setting f(x)=0 we are looking for the x-intercept or the zeros(roots)

(x-intercept , zero, root) (x-intercept , zero, root)

Finding the zeros(roots) using TI-83• Press “2nd” and “Trace” buttons

The screen should change to this..

Go to the zero option and hit Enter.

Finding the zeros(roots) using TI-83

The CPU is asking for a left bound. Move the “DOT” to the left side of one of the roots. Use the arrow keys to move the dot.

Finding the zeros(roots) using TI-83• Jjjj roots(zeros)

• (2 roots in this example) •

The dot is now on the left side of one of the roots. Push Enter.

The CPU is asking for a right boundMove the dot to the right side of root.

Finding the zeros(roots) using TI-83

• Kk (zero that we are trying to calculate)

The dot is now on the right side of the root. Push Enter.

The CPU is asking for a Guess? Push Enter again.

Finding the zeros(roots) using TI-83• The CPU has calculated one of

the roots to be 0.5

• Notice that the Y-Value =0.

Y=0 is the definition of a X-intercept.

Go find the other root.

Finding the zeros(roots) using TI-83

Here is the other root.