Volume 3, Number 6

 ``` 9 February 1998 Vol. 3, No. 6 THE MATH FORUM INTERNET NEWS Graphing Linear Equations | Polyominoes - Lanius |Journals - Penn State ALGEBRA I: GRAPHING LINEAR EQUATIONS - Tim O'Brien http://www.terragon.com/tkobrien/algebra/index.html A Master's Degree project designed to provide an understanding of the graphing of linear equations at the Algebra 1 level. Twelve topics are covered: - Ordered Pairs - Graphing Equations 1 - Graphing Equations 2 - Horizontal Lines - Vertical Lines - Slope - Equations and Slope - Find Equation of Line - Scatter Plots - Parallel Lines - Perpendicular Lines - Solve a System. Also included are Quizzes and Tests; Ask the Teacher (email a question); a Discussion Room, Glossary, Index, and Message Board; a Crossword Puzzle and Word Search; and an Internet project predicting the number of people who will vote in the year 2004. O'Brien provides a simple scientific calculator and a plotter that can graph functions, differentials, and integrals to help with algebra, trigonometry, and calculus homework. A Java-enabled browser is needed to use the applets and scripts found throughout the site. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- POLYOMINOES - Cynthia Lanius http://math.rice.edu/~lanius/Lessons/Polys/poly1.html A Web unit for home schoolers or classroom teachers with an introduction to triominoes, tetrominoes, and pentominoes that provides colorful illustrations, leads students to discover the 12 pentominoes, and challenges them to draw as many of the 35 different hexominoes as they can. An investigation into the perimeters of polyominoes asks students to find patterns, make predictions, complete a table of minimum and maximum perimeters, and graph the ordered pairs as points on a coordinate plane. A final task is to find the curve of best fit for the long and short perimeters. Teachers' Notes and links to polyominoes on the Web are also included in this unit. For another look at how Cynthia Lanius uses hypertext and the Web in her classroom at Milby High School in Houston, Texas, see GEOMETRY ONLINE: http://math.rice.edu/~lanius/Geom/ -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- ELECTRONIC AND PRINT JOURNALS Penn State's Comprehensive List http://www.math.psu.edu/MathLists/Journals.html Links to dozens of journals, from the Academic press electronic journal library to the Ulam Quarterly. The list also spans printed journals from Abstract and Applied Analysis to the Zentralblatt fur Mathematik. A link to the Bibliotheque Mathematique et Informatique at the University of Bordeaux provides another table of contents for online journals: http://almira.ceremab.u-bordeaux.fr/cgi-bin/periodiques? and Penn State's page of preprints follows: http://www.math.psu.edu/MathLists/Preprints.html -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- CHECK OUT OUR WEB SITE: The Math Forum http://mathforum.org/ Ask Dr. Math http://mathforum.org/dr.math/ Problems of the Week http://mathforum.org/students/ Internet Resources http://mathforum.org/~steve/ Join the Math Forum http://mathforum.org/join.forum.html Send comments to the Math Forum Internet Newsletter editors _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \ ```