The Precalculus TI-83/TI-84 Tutorial

For a general piecewise-defined function consisting of two or more expressions, we define each expression as a separate function and use a test function to restrict the domain as necessary. Here is how we would graph

f(x) = 2x+1 if x <= -1, or x^2-3 if x > -1 .

This function "stitches together" two expressions. Enter the first expression divided by its domain as Y1, the second expression and domain as Y2. Both the expression and the domain must be enclosed within parentheses.