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ResourceSpotlight
This activity introduces absolute value from a data value perspective. Students examine data by comparing individual data points to the mean by finding the difference (positive or negative) and the distance from the mean. They then plot the distances vs. the differences and examine the shape of the plot. This leads to an investigation of the absolute value function as a model of the relationship between the differences and the distances.
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Texas Instruments, Inc.
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ResourceSpotlight
In this activity, students will use ordered pairs, table of values, and a scatter plot to determine a function that represents real world data. Students will respond to questions about dog ages in human years, domain, range, and how the slope appears to be changing in the data/graph. In the extension students will use what they have learned in the activity to analyze cat’s ages.
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Texas Instruments, Inc.
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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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A helpful scientific calculator that runs in your web browser window.
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Holt Online Learning
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This video includes sample exercises and step-by-step explanations of functions and probability for the California Standards Test.
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Khan Academy
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This video includes sample exercises and step-by-step explanations of functions, domain and range for the California Standards Test.
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Khan Academy
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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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Web page explaining how function composition works, with some worked examples.
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S.O.S. Math
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An online graphing calculator for students who do not have a hand-held one.
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algebra.help
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