Functions and Graphs
Function notation

Functions and Graphs

• Direct proportion
• Inverse proportion
• Rational Functions
• Testing if a relationship is a function
• Checking if an equation represents a function
• Function notation
• Composite functions
• Range and domain
• Sign diagrams​

Function notation is common way that equations are written in if they represent a function.
Two equivalent forms to represent a function are f(x)=x+1 and y=x+1.
f(x) is the value of y for a given value of x, so y=f(x).