A or B can be zero but not both at the same time. For example the equation y 2x 3 has a slope of 2 and has a y-intersection at 0 3 as illustrated. In this form we can easily spot the slope m and the y-intercept b.
The slope-intercept form ymxc highlights the slope and the y-intercept of the line.
The Slope-Intercept Form of the equation of a straight line. Y y 1 mx x 1 Example. Once we know the slope-intercept form we can read off the number in front of the x the m to find the slope. For example the equation y 2x 3 has a slope of 2 and has a y-intersection at 0 3 as illustrated.