Abby took an after-school job as a checker at Petco. She stocks 9 large bags of cat food per hour and there are already 7 large bags on the shelf when she started working. Write a function rule for the number of customers Abby has checked out after 'x' hours.
no idea. How do customers relate to the bags she stocks?
im guessing they each buy 1
so 1 bag would equal to one customer
so, she stocks 9 bags per hour. So, a good first guess would be
f(x) = 9x
But she started with 7 bags, so how do you think that changes the function?
f(x)=9x+7 because it wouldn't subtract from the eqaution
your answer is correct, but I'm not sure about your logic.
"wouldn't subtract from the equation" ?
It's f(x) = 9x+7 because if it were just f(x) = 9x then
f(0) would be 9*0 = 0
But, there were 7 bags to start with (x=0), so that means f(x) = 9x+7