The given function is not defined at a certain point. How should it be defined at that point to make it continuous at that point?
f(x) = (x ^ 2 + 2x - 80)/(x - 8)
(x^2 + 2x - 80) = (x -8)(x + 10)
So
(x - 8) ( x + 10) / (x -8) = x + 10
So the function should be defined as
x + 10 if x ≠ 8
f(x) =
18 if x = 8
+61 
