Question 80687
Two points determines a straight line, which can be written in slope-intercept form y=mx+b.  

To find the equation of that line, you must first find the slope "m" of the line, using the formula {{{m=(RISE)/(RUN)=(y[2] -y[1])/(x[2]-x[1]) }}}.  


Next, there are two ways to find the equation.  One method is called the "Point-slope formula" {{{y-y[1]=m(x-x[1]) }}}.  The second method (which I recommend!) is to substitute the slope and one of x and y values of one of the points into the formula y=mx+b, and solve for b.


R^2 at SCC (almost retired!)