Graphing Calculator Magic
Graphing Calculator Magic
Becca Anderson
The Equation solver is something that I wish I had known how to use in high school and college math! The solver allows you to solve for a variable or to make guesses at values of an equation with much less scribbling on paper. I have provided basic directions for using the equation solver. For more help and tips see the TI-83 manual which explains using the solver with stored values, changing bounds and other cool things.
Using the Equation Solver:
1.Turn on your calculator and press the MATH button in the far left column of buttons.
2. Use the arrows to move to option 0:SOLVER.
3. Hit ENTER.
4. If this option has never been used before the screen will read,
EQUATION SOLVER
Eqn:0=
Type in the equation T2 – 6X + 2 after the 0=
--T can be typed by first hitting the green ALPHA button and then the number 4, you
should see a green T above the 4
-- To make T squared, hit the x2 button in the far left column of buttons.
5. Hit ENTER after typing in the equation and the solution will appear on the screen.
IF equation solver has already been used on your calculator, the previous answer will appear on your screen after you select 0:Solver in step 2.
--To proceed, use the up arrow to scroll up the answer to the Equation Solver screen and replace the equation with the equation in step 4.
--Then hit ENTER and the answer will be recalculated for your equation.
IF you are using two different variables, you will need to make a guess for at least one of the variables because there can be more than one solution. You can make a guess by scrolling to the answer in the solver and replacing the value with your guess. Then the equation will be reevaluated for your guess.
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