A bakery sells 4200 cookies in 2010. The bakery sells 5600 cookies in 2015. Write a linear model that represents the number y of cookies that the bakery sells x years after 2010.
y=
Assuming the number of cookies goes up the same ammount each year:
5600 - 4200 = 1400 increase in 5 years
1400/5 = 280 increase per year
y = 4200 + 280 x where x = number of years after 2010
+24 
