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Linear Equation
The linear equation describes a graph that is a straight line in a 2D coordinate system. The equation is:
y = m • x + n
The slope m and the y-intercept n (also called b) are the constants which describe the character of a straight line. The variable is x which represents the horizontal position in the coordinate system. y is the value (or height) of the line corresponding to the x.
How to use it
There are many different ways how to start a calculation. You can enter values for m and n or you use the coordinates of two points (x1/y1 and x2/y2). You also can mix it up. To see all 9 possible value combinations please click the pink “?”-button.
The buttons on the left side show the possible symbols you can enter. Decimals and fractions are supported.
To calculate the result with your input press the green “=“-button.
What does the calculator do?
It might take some seconds before the result shows up.
- Inserts your values.
- Simplifies your input (if you did enter fractions)
- Shows the resulting linear equation.
- Shows every step to calculate the result.
- Draws a graph of the linear equation.
Your calculation will appear here!
Video introduction
Khan Academy gives a nice overview of the idea of the linear equation itself. This is the first step if you are new to linear equations.
A really short and brilliant tutorial of eHowEducation gives an example of how to receive a linear equation that passes two certain points.
Did you notice that she writes mirror-inverted?
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