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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
