Step-by-step solutions to odd-numbered problems from dozens of middle school math textbooks.
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Hotmath
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This site has great coordinate grids that can be copied and pasted into documents or other programs.
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Iowa Math
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Description of direct variation and the constant of variation; with a graph and related question
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Oswego City School District Regents Exam Prep Center
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Seeing Math™ has developed interactive software tools to clarify key mathematical ideas in middle and high school mathematics. Each interactive provides a real-time connection between representations of the mathematics (symbolic, graphical, etc.), so that changes in one representation instantly cause changes in the other
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Seeing Math™ Secondary: Dynamic Interactive
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Covers the absolute value function and how to graph it
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Algebra Lab
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Interactive tutorial and explanation involving qudratic functions (graphing and equations).
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Analyze Math
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Explains how to work with linear equations, slope, slope intercept, point slope, standard form of a line, and graphing. Includes many examples, which are worked out step by step as well as with sound.
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Algebasics
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Gives the formula for the distance between any two points on a graph and relates it to the Pythagorean Theorem.
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About.com
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Lesson on how to read, use, and make line graphs.
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Math Goodies
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Students can practice making their own histograms.
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Draw a Histogram
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