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# section11_material - Section 1.1 Functions from the...

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MATH 110 BUSINESS CALCULUS CHAPTER 1 FUNCTIONS AND LINEAR MODELS Section 1.1 Functions from the Numerical and Algebraic Viewpoints A function is a rule that assigns to each input value exactly one output value. Function notation : If y is a function of x , then we can write ( ) y f x = . The variable x is called the independent variable. The variable y is called the dependent variable. Domain and Range of a Function: The set of values of the independent variable for which a function is defined is called the domain of the function. The range of function f is the set of all y (output) values such that ( ) y f x = for all x in the domain of f

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A function can be described by: Verbal description (words) A table A graph

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