Slope intercept form is y=mx+b m=slope b=y-intercept
the slope is the rate of change of the graph, basically rise/run (change in y divided by change in x)
the y intercept is where the graph intercepts the y axis
we usually use this form because we can find the slope and find where it hits the y axis. there are other forms that may be helpful later on, but this one is usually the easiest form to find from a graph