First you have to find y=mx+b so to find m(slope) you use the equation y2-y1/x2-x1 and choose any too coordinates. slope(rate of change)= 2/5. Now you plug in any coordinate and plug it in as x and y. (x,y) is how you know which number is x and y. And you should get a y-intercept or b = 0. This means the equation of the line is y= 2/5x.
