FUNCTIONS AND GRAPHS
MATH 121 FALL 2011
Instructor: Dr. R. P. Webber
Office and hours: Ruffner 332. Hours MF, 2  3:00; T 1:30  3:00; and by appointment or coincidence
Telephone: 3952192
email: webberrp@longwood.edu
Course description: Graphical, numerical, and algebraic study of functions. Functions will include linear, polynomial, radical, and exponential as well as their applications in sequences and series. Linear and quadratic equations and inequalities will also be studied.
Course objectives:
The student will understand the concept of a mathematical model and how a model
can be used in applications. The student will understand the limitations
of mathematical modeling. The student will be able to use linear,
polynomial, exponential, and radical functions to find a model. The
student will be able to use a graphing calculator to explore the
characteristics of a function. The
student will be able to solve linear and quadratic equations and inequalities.
Text: Kalman, Elementary Mathematical Models. Mathematical Association of America, 1997. ISBN 9780883857076.
Course requirements and grading: There will be three tests and one composite quiz grade, of which you may drop one. The resulting three marks, counted equally, will comprise 48% of your course grade. Your project will count 15% of your course grade, your class participation grade will count 15%, and the final exam will count the remaining 22%. The grading scale goes by tens: 90  100, A; 80  90, B; 70  80, C; 60  70, D; below 60, F. Plus and minus grades will ordinarily be given for grades in the upper 2 and lower 2 points, respectively, of each range.
Homework: Problems will be assigned regularly, and everyone is expected to do them. They will not be collected without warning, and it is your responsibility to do all of the assigned problems. Feel free to work with others on the homework problems, and ask me about problems that you cannot solve.
Quizzes: Given frequently (but not every day), quizzes are given at the start of the period. They are intended to see if you have read the material and done the simple exercises. Quizzes are always short, and they are open book and notes. Often they are taken directly from the homework. Quizzes that are missed for any reason cannot be made up. You may miss one quiz without penalty, but you will be assigned a grade of 0 for any additional quizzes that you miss.
Class participation: Often you will be asked to work in groups in class. Working in small groups of three or four, you will be asked to solve a problem and present your results to the class. Missed class participation sessions cannot be made up, but you will be allowed one absence from a class participation session without penalty. You will receive a grade of 0 for each additional missed session.
Project: There will be a written project near the end of the course. It is to be typed and proofread. The topic and a grading rubric will be given.
Attendance: Your attendance is expected at all classes. Makeup tests will be given reluctantly, and then only upon presentation of a doctor's excuse. Makeup tests are always more difficult than regular tests, regardless of the reason for absence. You may not make up missed class participation sessions nor quizzes.
Honor code: I subscribe to the Longwood University honor system, which, among other things, assumes you do not cheat and that you take responsibility to see that others do not. Infractions will be dealt with harshly. A student who is convicted of an Honor Code offense involving this class will receive a course grade of F, in addition to any penalties imposed by the Honor Board.
Calculator: You will need a graphing calculator for this course. It must (at least) be able to graph and trace functions and create at least four regression models (linear, power, exponential, and logarithmic). I strongly recommend the TI83 or TI84.
Learn how to use your calculator, and bring it to class. You will need to use it on quizzes, in group work, and on tests.
Course schedule:
Week
1 Aug 22 – 26 
Chapters
1, 2: Mathematical models; difference
equations 
Week
2 Aug 29 – Sep 2 
Chapter
3: Arithmetic growth 
Labor Day September 5 – no
classes 

Week
3 Sep 7  9 
Chapter
4: Linear functions 
Week
4 Sep 12  16 
Chapter
5: Linear and quadratic models 
Week
5 Sep 19 – 23 
Chapter
5: Quadratic models; review; TEST 
Week
6 Sep 26 – 30 
Chapter
6: Quadratic functions 
Week
7 Oct 3  7 
Chapter
7: Polynomial and rational functions 
Fall break October 10 – 11 

Week
8 Oct 12 – 14 
Chapter
9: Geometric growth 
Week
9 Oct 17 – 21 
Chapter
9: Geometric models; review; TEST 
Week
10 Oct 24 – 28 
Chapter
10: Exponential models 
Week
11 Oct 31 – Nov 4 
Chapter
12: Mixed models 
Week
12 Nov 7 – 11 
Chapter
13: Logistic growth 
Week
13 Nov 14 – 18 
Chapter
14: Chaos in models 
Week
14 Nov 21 
Writing
assignment 

Thanksgiving break November 23  25 
Week 15 Nov 28 – Dec 2 
Review; TEST; review 
EXAM
Tuesday, December 6 
11:30
– 2:00 p.m. 