A discussion of the special features of the square root function, vs. taking the square root.
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Ask Dr. Math
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A discussion of the differences between relations and functions.
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Ask Dr. Math
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A discussion of the inputs that make sense for particular functions.
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Ask Dr. Math
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This is a virtual game that allows students to practice their knowledge about functions by either finding the input or output of a function. The game also allows students to find the entire function given some information.
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Lacoe.Edu
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Step-by-step solutions to odd-numbered problems from dozens of pre-algebra textbooks.
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Hotmath
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6th grade math knowledge map info
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StudyStack
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A helpful scientific calculator that runs in your web browser window.
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Holt Online Learning
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In this video, Salman Khan of Khan Academy explains functions. Part 1 of 4.
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Khan Academy
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A discussion of the difference between functions and equations.
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Ask Dr. Math
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This gives a detailed explanation on what it means for a function to be symmetric about the y-axis, the x-axis, and the origin.
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Paul's Online Math Notes
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