Math 30 College Algebra February 28, 2000

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Math 30 --- College AlgebraFebruary 28, 2000

• Section 2.4 and 2.5 due
• Finish Section 2.6
• Break
• Section 2.7
• Assignment 16

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AnnouncementsFebruary 28, 2000

• Exam 2 Monday, March 6
• No Calculator

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Fractions
Recall, given the fraction . If A0 and
, then f0. If B0, then f is undefined.
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Rational Functions
A rational function is a function f that is the
quotient of two polynomials where P(x) and Q(x)
are polynomials with no common factor other than
1 and -1 and where Q(x) in not the zero
polynomial. The domain of f consists of all
inputs x for which Q(x)
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Graphing Rational Functions
Goals 1) Intercepts y-intercepts
x-intercepts 2) Asymptotes vertical
horizontal/oblique
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Graphing Rational Functions
Asymptotes horizontal oblique/slant the
quotient of the ratio is the asymptote.
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Signed Numbers
Recall, (pos)(pos)(pos) (pos)(neg)(neg) (neg)(n
eg)(pos) (neg)(pos)(neg) (pos)/(pos)(pos) (p
os)/(neg)(neg) (neg)/(neg)(pos) (neg)/(pos)(ne
g)
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Critical Values
Given the rational function The critical values
of the function are the values of x where the
function is zero or undefined.
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Assignment 16

• For Wednesday Read 3.1
• Section 2.6 due Wednesday.
• Homework
• 2.7 pbs 5-50 (every 5th), 61-64