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1. Ch 8 and 11 By Brian Trudell
Revised by Claire Suddeth
2. 8.1A Quadratic Functions Graphical Analysis A function is a rule that states for every input value there is exactly one output value.
The vertical line test is used to determine if the graph of a relation is a function. If a vertical line intersects the graph exactly once, then the graph represents a function. Look at the graphs below.
The graph of quadratic function is called a parabola.
3. Functions:
4. Not a function:
5. Refer to the graph below for the following examples