You may already be familiar with the ymxb form called the slope-intercept form of the equation of a line. The equation can be in any form as long as its linear and and you can find the slope and y-intercept. It is the same equation in a different form.
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The b value called the y-intercept is where the line crosses the y-axis. This y-value is therefore also the y-intercept. The equation can be in any form as long as its linear and and you can find the slope and y-intercept. 32 is constant m in this equation and thus the slope of the equation.