SOLUTION: A man starts walking for the first week and walks 10 miles. Every week he increases by 2 miles. How many miles does he walk by the eigth week? I don't know how to set up the func

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A man starts walking for the first week and walks 10 miles. Every week he increases by 2 miles. How many miles does he walk by the eigth week? I don't know how to set up the func      Log On


   



Question 398274: A man starts walking for the first week and walks 10 miles. Every week he increases by 2 miles. How many miles does he walk by the eigth week? I don't know how to set up the function? I can get the answer but don't know how to set up the function?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let w = the number of weeks he has walked
Let D%28w%29 = the distance he walks
the function is:
D%28w%29+=+8+%2B+2w
The points, (w,D(w)), are
(1,10)
(2,12)
(3,14)
etc.
So by week 8,
D%288%29+=+8+%2B+2%2A8
D%288%29+=+24 miles