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HOW TO EVALUATE A FUNCTION WITH TI83 CALCULATOR

Steps Key Sequence Screens
1. Input Function or
Piecewise-Defined Function
 
METHOD 1:
2. Quit Equation Editor Press 2nd, then MODE (for QUIT)
3. Evaluate Function for
any x Value (e.g., x = 2.5)
Press VARS key
  Press right arrow key once (to highlight Y-VARS)
  Press ENTER (for Function...)
  Press ENTER (for Y1)
  Type appropriate x-value in parentheses
  Press ENTER
NOTE: If f(x) = x2 + 3x + 5, then f(2) = 15.
4. Evaluate Function for
another x Value
Type 2nd, then ENTER (for ENTRY)
  Move cursor to the inside ( ), type new value for x, then ENTER
  Type new value for x, then ENTER
  Press ENTER
METHOD 2:
2. Graph the Function Press GRAPH
3. Evaluate Function for
any x Value (e.g., x = 2)
Press TRACE key
  Type appropriate x-value, then ENTER
NOTE: If y = x2 + 3x + 5, then y = 15.
4. Evaluate Function for
another x Value
Type another x-value, then ENTER
METHOD 3:
2. Create Table of Values for Function