Finding slope.

Question

What is the slope in this function f(0)=7; f(n+1) = f(n)+5

Answer 1

Slope = [Change in f] / [Change in n] 

         = [f(n+1) - f(n)] / [(n+1) - n]

         = [f(n) + 5 - f(n)] / 1

         = 5