Graph a piecewise function

01

Press these keys

ALPHAY=piecewise2ndMATH

02

Walkthrough

1
Open template
In Y= press ALPHA → Y= (shortcut menu) and choose the piecewise template available on current CE OS versions.
2
Enter rules
Fill each expression and its condition; use 2nd → MATH (TEST) for <, ≤, > or ≥.
3
Check endpoints
Use TRACE or TABLE to verify included and excluded boundary values.

03

Worked example

Graph f(x)=x+2 for x<0 and x² for x≥0.

NORMAL FLOAT AUTO REAL MPtwo pieces meeting at x=0f(0)=0

AnswerThe filled value at x=0 comes from the second rule.