The growth of social media can often be modelled by exponential growth. Here is some data on Pinterest. This represents the number of unique visitors in thousand for the months May 2011 to Jan. 2012t

Month Visitors in thousands

May 11 418

June 11 608

jul 11 1031

Aug 1270

Sept 11 2023

Oct 11 3295

Nov 11 4855

Dec 11 7516

Jan 12 11716

a) Draw a nice scatter diagram in Excel and appropriately label this graph

b) Find the exponential regression model and report the equation. Use months since May 2011 as the input variable

c) Find the linear regression model and report the equation. Use months since May 2011 as the input variable

d) Use both models to predict the result in Feb 2012. IF the actual number was 16232000 which model did a better job predicting this result