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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, slopeintercept, 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.
 SlopeIntercept Formula [06/05/2001]

Why does y = mx + b have to be that way?
 Standard Form in Linear Equations [11/21/2001]

Where is standard form used?
 TCharts and Graphs [11/11/2001]

Make a table of values for the line y = x/4+4 using xvalues of 1,2,3,4,
and 5. Which graph shows the line that passes through the ordered pairs
of the table?
 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 yaxis generally vertical and the xaxis
generally horizontal?
 Why Y Rises and X Runs [12/19/2012]

A teacher seeks an explanation for why slope is "rise over run" rather than "run over
rise." Doctor Peterson reveals the logic, as well as a way to investigate these kinds of
imponderables, before affirming her derivation from slopeintercept form and
suggesting related motivations from other applications.
 Write in SlopeIntercept Form [11/06/1997]

Write and sketch x  y + 2 = 0 .
 X and YIntercepts [09/15/1998]

I'm having a hard time finding out how to solve an equation and then do
the graph. The intercepts confuse me also...
 X Line in a 3D Graph [03/10/2001]

Which is the x line  vertical or horizontal?
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