Open Desmos Graphing Calculator
Enter each piece of the function on a separate line
Use curly braces for domain restrictions
Format each piece as `expression {condition}`
Use inequalities to limit where each piece appears
Example: `y=x^2 {x<0}`
Example: `y=2x+1 {0<=x<=3}`
Example: `y=5 {x>3}`
Use `<=` and `>=` for closed endpoints
Use `<` and `>` for open endpoints
Add points with `(x,y)` if needed
Use filled points for included endpoints
Use open circles for excluded endpoints
Check that all domain conditions do not overlap incorrectly
Adjust each piece until the graph matches the function
Use parentheses to group conditions when needed
Example: `y={x<1: x^2, x>=1: 2x+1}`