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function

f is a rule that assigns to each element x in a set D exactly one element, called f(x), in a set E

Vertical Line Test

a curve in the xy plane is the graph of a function of x if and only if no vertical line intersects the curve more than once

Even function

If a function f(x)=f(x)

Even function example

x^2

odd function

f(x)=f(x)

Process of determining even or odd

1. plug in negative x
2. plug in 1 
Even function

symmetric in respect to y axis

Odd function

symmetric in respect to origin

Domain of polynomial

ALL REAL NUMBERS

quadratic function

P(x)=ax^2+bx+c
