DEMO Evaluating A Function (Page 1 of 12)

There are many different ways to evaluate a function on the TI-83 or TI-84. Let's use the function f(x) = 3x^2-5x+2 and evaluate this function at x = 4.5. We can do this on the Home screen by storing the value of 4.5 into x and then entering the expression for f. This can be done efficiently with a single command line if we use the colon key.

CLEAR key.

4 key. Period key. 5 key. STORE key. X,T,Theta,n key. ALPHA COLON key.

3 key. X,T,Theta,n key. x-squared key. Minus key. 5 key. X,T,Theta,n key. Plus key. 2 key. ENTER key.

 Calculator screen image.
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