Slope Intercept Form Formula For the equation y mx b m is the slope of the line that is multiplied by x and b is the y-intercept or we can say the point where the line will cross the vertical y-axis. To find the slope intercept form from the given two points just follow the given steps for manual calculation. You may already be familiar with the ymxb form called the slope-intercept form of the equation of a line.
You can think of the first set of coordinates x y -2 4 as representing X 1 and Y 1 and the second set of coordinates 1 2 as representing X 2 and Y 2.
12 is the y intercept b and -1 is the slope m and X is just there because its supposed to be. Find the y-intercept b. This gives you y 3x b. Substituting into the slope-intercept formula y mx b y mx b we have The slope is positive thus the line is increasing or rising from left to right but passing through the y y -axis at point.