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Chapter Two
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Equations –statement where two expressions are equal
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Slope – change in the dependent variable divided by the change in the independent variable
o
If X changes by one units, Y changes by m units
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M is a parameter and multiplier
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Intercepts
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XIntercept: plug in 0 for Y
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YIntercept: plug in 0 for X
Chapter Three
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Function – mathematical rule that assigns for each value of Y, only one variable of X
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Value of Y depends on the value of X
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Rational function: f(x)= g(x) / h(x)
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Composite functions:
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Explicit function: all variables, except y, are on right hand side
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Quadratics
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Quadratic formula
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Vertex:
( 
, 
)
b2a f b2a
Chapter Four
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System of Equations
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N equations with v variables = dimensions of n x v
If n=v then a exactly constrained system
If n < v under constrained system; unlimited or no solutions
If n> v then an over constrained system
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If equations are parallel the equations are inconsistent
o
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 Spring '11
 MikaelSandberg

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