Find the radius of convergence, r, of the series. ∞ n2xn 8 · 16 · 24 · ⋯ · (8n) n = 1

Alandscaper wants to find the answer to the question “how much time do people in raleigh, north carolina, spend doing yard work in one week? ” he asks the owners of all 120 houses in a raleigh neighborhood. which  best  describes the accuracy of the results of the survey?

I'm pretty sure it's b). i try drawing the functions out and b is the one that stands out or isnt a "line"