What is the avarage rate from x=1 to x=3

I'm really not allowed to follow a link outside of . Don't make a habit of it. I take it we are still on y = 8*(1.2)^x

Rate of change = (y2 - y1)/(x2 - x1) = (13.824 - 9.6) / 3 - 1

Rate of change = (4.224) / 2 = 2.112

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.