3) y=3.5x
4) 3.5(72) = 252 pages for 72 min.
First we divide 21 by 6 to find the how many pages there is in 1 min. (we got 3.5) then we multiply (3.5) by the number of minutes (72) and we get 252 pages for 72 minutes.
Hope that helped:)
1.6m questions
2.0m answers