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Word Problems

Browse Middle School Graphing Equations
Stars indicate particularly interesting answers or good places to begin browsing.

Selected answers to common questions:
    Direct and indirect variation.
    Slope, slope-intercept, standard form.

Plotting Points in the Coordinate Plane [01/16/2004]
What is the coordinate plane and how do I plot points like (4,2) on it?

Quadrant [03/25/2001]
What is a quadrant?

Sketching Shortcuts [09/30/2012]
An upperclassman quickly sketches a graph packed with logarithms and absolute values; an underclasswoman marvels at his speed — and seeks shortcuts. Doctor Douglas walks through his routine for plotting curves, and along the way exploits symmetries that conserve effort.

Slope-Intercept Formula [06/05/2001]

Standard Form in Linear Equations [11/21/2001]
Where is standard form used?

T-Charts and Graphs [11/11/2001]

Translation [9/11/1996]
What does translation mean?

Using X and Y to Represent the Axes [9/29/1995]
Why are the axes on a graph x and y and not any other letter in the alphabet, and why is the y-axis generally vertical and the x-axis generally horizontal?


Write and sketch x - y + 2 = 0 .


X Line in a 3D Graph [03/10/2001]
Which is the x line - vertical or horizontal?

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