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Browse High School Linear Equations
Stars indicate particularly interesting answers or
good places to begin browsing.
Selected answers to common questions:
Diophantine equations.
Solving simple linear equations.
 Vectors and Linear Combinations [01/25/1999]

If vector v0 = (x0, y0, z0) and vector v1 = (x1, y1, z1) both satisfy ax
+ by + cz = d, then why does mv0 + nv1, where m + n = 1, satisfy that
equation too?
 Volume by Inch of a ConeShaped Tank [03/03/2003]

I have a chemical tank that has a cone bottom and I need to know the
volume of each inch of the cone.
 A Way to Estimate the Square Root of Any Number [03/16/2006]

A student studying square roots discovers an interesting method of
estimating nonperfect roots and is curious why it works.
 A Way to Remember What 'm' and 'b' Mean in SlopeIntercept Form [02/01/2004]

An interesting memory trick to help you remember how to graph a linear
equation in slopeintercept form.
 What is Nonlinear Math? [10/02/1997]

What exactly is nonlinear math, and what is it used for?
 When is a Slope 0 or Undefined? [3/29/1997]

How do I know when the slope of an equation is zero or undefined (no
slope)?
 Why b for Intercept? [10/16/2003]

In the slopeintercept formula, y = mx + b, why is 'b' used to
represent the yintercept?
 Why Does Adding Equations to Solve a System Work? [02/10/2007]

I know you can add two linear equations together to eliminate one
variable as part of solving a system of equations, but I don't
understand why that works. Are you adding the lines together? What
does the resulting equation represent in terms of the original lines?
 Why Does the Slope Formula Work? [10/29/2008]

How does the slope formula (y2  y1)/(x2  x1), which uses subtraction
and division, come up with a slope?
 Why is 'b' Used in SlopeIntercept Form? [02/04/2004]

Why is the letter 'b' used for the yintercept in the slopeintercept
form of a linear equation?
 Why Is Slope Rise Over Run and Not Run Over Rise? [03/05/2005]

We were wondering today in math class why slope is defined as rise
over run and why it couldn't be run over rise?
 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...
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