SOLUTION: PLEASE HELP ME!! The number of cremations in a country have increased steadily since 1980. Let p=f(t) be the percentage of bodies that are cremated at t years since 1980. Yea

Question 847462: PLEASE HELP ME!!
The number of cremations in a country have increased steadily since 1980. Let p=f(t) be the percentage of bodies that are cremated at t years since 1980.
Year Number of reported cases
1980 9.6
1985 13.5
1990 16.9
1995 20.8
2000 26.1
2006 33.4
Question: Find an equation of f(t).
PLEASE SHOW ME HOW YOU GET THE ANSWER ON THE CALCULATOR!
PLEASE HELP ME! THANKS!
Answer by swincher4391(1107) (Show Source): You can put this solution on YOUR website!
First sum up your number of reported cases to get the total number of reported cases. You should get 120.3.
Type your data as is, but convert each number of reported cases to a percentage by dividing by 120.3 to each. Verify that your resulting percentages add up to 1.
It's best to type in this data to your TI-84 using the LIST ability. Put your years in L1, put the percentage cremations in L2.
Go to STAT > CALC > LinReg(ax+b)
It tells you what a and b are equal to.
Here's what your scatterplot "should" look like:

Verify that this is your answer. Instead of x, use t.
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