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From Wolfram MathWorld:
A linear equation is an algebraic equation of the form y=mx+b involving only a constant and a first-order (linear) term, where m is the slope and b is the y-intercept.
Occasionally, the above is called a "linear equation of two variables," where y and x are the variables.
Linear Equation -- from Wolfram MathWorld
m=riserun Change in y coordinates to change in x coordinates m=y2−y1x2−x1 Standard Form: [used when you know, or can find, the slope, m, and the y-intercept, b.] Ax+By=C Slope Intercept Form: [used when you know, or can find, the slope, m, and the y-intercept, b.] y=mx+b Point Slope Form: [used when you know, or can find, a point on the line (x1, y1), and the slope, m.] y−y1=m(x−x1)
A general example to help you recognize patterns and spot the information you're looking for
Slope of the line: m=(−5)3 Standard Form: 5x+3y=2 Slope Intercept Form: m=(−5)3, intercept (0,23) y=(−5)3x+23 Point Slope Form: y+1=(−5)3(x+1)
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