## Algebra 1: Common Core (15th Edition)

The point-slope form is y=mx+b. The formula for slope is m=$\frac{y2-y1}{x2-x1}$ Using points from the graph (2,1)(0,-3), the slope is m=$\frac{1-(-3)}{2-0}$=$\frac{4}{2}$ =2. Using the point-slope formula and (2,1): 1=2(2)+b 1=4+b b=-3 Plug these values into the point-slope form so the equation is y=2x-3.