Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

Lets make my scenario not generic just so that i could use particular terms

Say i have a graph of population per year of someplace over some decades

Lets say the graph is like this

  • How can i calculate expected\estimated population next year and son on and so forth
share|improve this question
Do you mean like doing a linear regression of the data points to determine a slope covering all the data points or something else? Could you quantify how you'd measure "speed of growth of the graph as a whole"? –  JB King Mar 18 '13 at 18:11
add comment

1 Answer

The link doesn't work for me, but your first stop should be linear regression. If you take the logarithm of the population you will be looking for an exponential increase-a fixed percentage change per year instead of a fixed number change per year. This is probably a better fit. Any numerical analysis text will have a chapter on this, or you can get Excel to do it. Graph the data as a scatter plot, right click on the graph, choose Add Trendline, and pick the kind of trendline you want.

share|improve this answer
add comment

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.