<span>You need to know two points on your line, in order to find the slope.
If you're given the y intercept, that is one point, (0,a) where a is the y intercept.
If you're given the x intercept, that's another point, (c,0) where c is the x intercept.
You could also be given points on the line that aren't an x or y intercept. Let's call these points (r,s) and (j,k).
To find the slope of the line, you need just two points. Take the
difference of the y coordinates, and divide by the difference of the x
coordinates to solve for the slope.
Using our two generic points (r,s) and (j,k), we would solve for the slope m as follows:
Um... Okay, there is another easy steps to do:) First, you have to pick two line on the graph for example: (7,8) and (3,4). Then, we just applied to the formula if finding the slope which is: m=(y2-y1)/(x2-x1) where m is the slope y2=4 y1=8 x2=3 x1=7 Apply to that same step to get: m=(4-8)/(3-7) m=-4/-4 m=1. Hope it help!
