1.7 Rational Functions - Domain

• By finding the range

  of the numerator

• By factoring the numerator and

  denominator

• By multiplying by the

  reciprocal of the denominator

• The domain is always ALL REAL

  NUMBERS

What is a Rational Function?

• A function with fractions in it

• A ratio of two

  polynomials

• A function with two ratios

• A function with vertical

  asymptotes

• Any function can be a rational function

• All real numbers

• All real numbers