Mx+b=y m is your slope which u can find by using two point see how far the x are and the y are then the y/x is your slope. Then he is your starting value so what y is when x= 0
Each person received 3 doughnuts, do 6 times 4 which is 24 and divide that among 8, its 3
The expression simplifies to 6x^(28/5)
hope this helps :)