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Slope-Intercept Form of an Equation of a Line
The slope-intercept form is a way of writing the equation of a line that directly displays the line's slope and y-intercept. For a line with slope and y-intercept at the point , the equation is:
In this form, the coefficient of gives the slope (how steep the line is and in which direction it tilts), and the constant term gives the y-coordinate of the point where the line crosses the y-axis. Because both key features of the line are visible at a glance, the slope-intercept form is especially useful for graphing and for comparing lines.
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