#exponential-growth

Question 1: Single choice

The 12-month moving average of a monthly sales series rises along a curve that bends upward. What is the lowest polynomial order of a trend feature that can follow the bend, and which non-polynomial curve may fit even better if sales grow by a roughly constant percentage a year?

Order 2 (a parabola), and an exponential curve1
Order 1 (a straight line), and a logarithmic curve2
Order 2 (a parabola), and a logarithmic curve3
Order 11, and a sine curve4

Timed test