M207-precalcReview1

# M207-precalcReview1 - MATH 207 Graphs and Functions(Review...

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Graphs and Functions (Review) MATH 207

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Distance Formula Example: Find distance between (-1,4) and (-4,-2). Answer: 6.71
Midpoint Formula Example: Find the midpoint from P 1(-5,5) to P 2(-3,1). Answer: (-4,3)

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The standard form of an equation of a circle with radius r and center ( h, k ) is: The Unit Circle equation is: x y ( h , k ) r ( x , y ) Equations in two variables – Example: Circle Equations ( 29 ( 29 2 2 2 r k y h x = - + - 2 2 2 r y x = +
Definition of a Function

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Theorem: Vertical Line Test A set of points in the xy - plane is the graph of a function if and only if a vertical line intersects the graph in at most one point.
x y Not a function.

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x y Function.
( 29 2 For the function defined by 3 2 , evaluate: f f x x x = - +

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(a) For each x in the domain of f , there is exactly one image f ( x ) in the range; however, an element in the range can result from more than one x in the domain. (b)

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## This note was uploaded on 03/01/2012 for the course MATH 207 taught by Professor Nedjlaougouag during the Spring '12 term at City Colleges of Chicago.

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M207-precalcReview1 - MATH 207 Graphs and Functions(Review...

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