Question 846532
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Hi,
 approximate equation h(t)= ab^t  h(t) = 1.24(.8476)^t
a(b)^0 = 1.24, {{{a = 1.24}}} 
{{{(1.24)b^4 = .64}}}, b ={{{root(4,(.64/1.24)) =  .8476}}}  
exponential regression equation(Used on-line calculator to find, may use TI) 
Y = 1.0124(.9268)^t
(recommend using Your TI as the best source for classroom work)
Using above to estimate the percentage rate of decay of revenues: 
1 + r = .9268, rate of decay = -.0732
h(12) ={{{ 1.0124(.9268)^12}}}

Note: this is the linear regression line = -.159x + 1.23  for points given
done in Excel