Chapter 8 - Section 8.1 - Review of Equations of Lines and Writing Parallel and Perpendicular Lines - Exercise Set - Page 574: 61

a) $y=-250x+3500$ b) 1,625 frisbees

a) $(6,2000)$ and $(8, 1500)$ $m=(2000-1500)/(6-8)$ $m=500/-2$ $m=-250$ $y=mx+b$ $2000=6*-250+b$ $2000=-1500+b$ $2000+1500=-1500+b+1500$ $3500= b$ $y=-250x+3500$ b) $y=-250x+3500$ $y=-250*7.5+3500$ $y=-1875+3500$ $y=1625$