2.) Monthly growth: It is actually really simple, you just caculate:
(16/1)to the power of (1/6) which equals: 1.58 This means the average growth rate was 58 %.
16/1 is the total growth rate for all 6 months. And to the power of (1/6) because it is calculated among 6 months
2) Right, that's how I calculated 58%, but does it really make sense to calculate the base off of some arbitrarily low first-month revenue? Does it make sense that a company with strong first month sales should have a much lower growth rate than a company with abysmal first-month sales, given a certain current monthly revenue?
2.) If your growth curve flattens out than this approach obviously does not really give you a good representation of how well you are currently doing.