If you are requesting lessons on the topic, please try this FreeMathHelp lesson.rhymeswith said:Plug the two given points (x1, y1) and (x2, y2) into the slope formula you've memorized:
m = [y1 - y2]/[x1 - x2]
(or maybe "m = [y2 - y2]/[x2 - x1]"; the order isn't important, as long as you subtract the x's in the same order as you subtracted the y's.)
Then pick one of the (x, y) points, and plug x, y, and m into "y = mx + b". Solve for b. Then re-write the equation with m and b.