1
Algebra II: Strand 5. Power, Polynomial, and Rational Functions; Topic 3. Rational
Functions; Task 5.3.5
TASK 5.3.5: REFLECT AND APPLY: WRITING FUNCTION RULES
Solutions
Use what you know about rational functions to write function rules that have the
particular characteristics. Verify your function by graphing it on the calculator. Be
prepared to demonstrate your functions in class.
1.
Write a rule for a function that has at least two vertical asymptotes.
Answers will vary. Look for a function that has at least two distinct zeros in the
denominator.
2.
Write a rule for a function that has one vertical asymptote and two removable
discontinuities.
Answers will vary. Look for a function that has three distinct zeros in the
denominator, two of which also appear in the numerator.
3.
Write a rule for a function that has an oblique asymptote and two vertical
asymptotes.
Answers will vary. Look for a function that has two distinct zeros in the
denominator and has a numerator that has a leading term of one degree greater
than the leading term of the denominator.
4.
Write a rule for a function that has a horizontal asymptote that is negative.
Answers will vary. Look for a function that has leading terms of the same degree
and leading coefficients that have opposite signs.
December 16, 2004. Ensuring Teacher Quality: Algebra II, produced by the Charles A. Dana Center at The University
of Texas at Austin for the Texas Higher Education Coordinating Board.
2
Algebra II: Strand 5. Power, Polynomial, and Rational Functions; Topic 3. Rational
Functions; Task 5.3.5
TASK 5.3.5: REFLECT AND APPLY: WRITING FUNCTION RULES
Use what you know about rational functions to write function rules that have the
particular characteristics. Verify your function by graphing it on the calculator. Be
prepared to demonstrate your functions in class.
1.
Write a rule for a function that has at least two vertical asymptotes.
2.
Write a rule for a function that has one vertical asymptote and two removable
discontinuities.
3.
Write a rule for a function that has an oblique asymptote and two vertical
asymptotes.
4.
Write a rule for a function that has a horizontal asymptote that is negative.
December 16, 2004. Ensuring Teacher Quality: Algebra II, produced by the Charles A. Dana Center at The University
of Texas at Austin for the Texas Higher Education Coordinating Board.