To find the equation of a line given the slope and a single point, you need to use the point-slope form of y - y1 = m(x - x1). It is almost identical to the slope-intercept form, but you have to find the point for the y-... More »

In algebra, the point-slope form of an equation for a line is written as y - y1 = m(x - x1). The variables y1 and x1 equal the values of the given point, and m equals the slope. More » Math Algebra

Slope-intercept form is a method for writing a linear equation in which the equation is written using the general formula y = mx + b. In slope-intercept form, the variable m refers to the slope of the line, and the varia... More » Math Algebra

The slope-intercept form of the equation of a line is y = mx + b, where m is the slope of the line and b is the y intercept. To solve for y, multiply the x value by the slope, then add the y-intercept. To solve for x, su... More » Math Algebra

Find the slope of the line (m), and the place where the line crosses the y-axis, known as the y-intercept (b), to write the equation in slope-intercept form, y = mx + b. Use the equation to find the y value for any x on ... More »

No one is sure why the letter "m" is used to represent slope in the equation of a line. While there are many theories, the variable may simply have been arbitrarily chosen and used as a standard convention. More » Math Algebra

To find a line's equation, identify two of the points through which the line passes, and then use the "x" and "y" coordinates to find the slope of the line, or the rate at which it climbs or falls. Use the slope to find ... More »