 #  Inverse Variation Function – A function that can be modeled with the equation y = k/x, also xy = k; where k does not equal zero.

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 Inverse Variation Function – A function that can be modeled with the equation y = k/x, also xy = k; where k does not equal zero.

 Inverse Variation Function - Graph

 Rational Functions - Asymptotes

 Rational Functions – Sketching the graph Draw all the asymptotes Determine where it is positive and negative Determine where it is Zero Sketch

 Rational Expressions – Multiplication / Division Restrictions – When the denominator is zero When dividing by zero Simplify by canceling like terms (factors)

 Complex Fractions – A fraction that has a fraction in the numerator or denominator

 Multiplying variables on both sides of an equal sign may introduce extraneous solutions.  Check for extraneous solutions by plugging into the original equation.

 If rational functions are added in an equation, use the LCD to multiply all terms and “clear” the fraction

 9-5 Adding and Subtracting Rationals First Column  9-6 Solving Rational Expressions First Column End at #38

 9-5 Adding and Subtracting Rationals First Column

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