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The Equation of a Straight Line

A function that describes a straight line in a coordinate system is described as linear and is usually written in a form called the slope-intercept form.

y=mx+cy=mx+c

The values mm and cc are constants and describe the characteristics of a line. The value mm indicates the slope or gradient, and the value cc is the yy-value where the line intersects the yy-axis, also called the 'y-intercept'. In the coordinate system below, the line's mm-value is 22 and the cc-value is 1.1.