Oddman answered ∆y/∆x = ((3/4+2) - (3/1+2))/(4 - 1) = (2 3/4 - 5)/3 = (-2 1/4)/3 = (-9/4)/3 = -3/4_____If you mean y = 3/(x+2)you will get a different result. ∆y/∆x = ((3/(4+2)) - (3/(1+2))/(4 - 1) = (3/6 - 3/3)/3 = (1/2 - 1)/3 = (-1/2)/3 = -1/6