A linear equation has a constant rate of change, or slope (change in y (dependent) value over change in x (independent) value), when graphed forms a straight trend line, and is in the format y=mx+b (y is dependent value, m is slope, x is independent value, and b is the y-intercept (the value of y when x=0).
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No a linear equation are not the same as a linear function. The linear function is written as Ax+By=C. The linear equation is f{x}=m+b.
A linear equation can have only one zero and that is the value of the variable for which the equation is true.
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a linear equation
The y-intercept of a linear equation is the point where the graph of the line represented by that equation crosses the y-axis.