Question

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.

Answer 1

y= 9x +7

Explanation:

What she starts with is 7 bags. That is the y intercept ( or 0 hours)

The rate is 9 bags per hour ( That is the slope)

y = mx+b, where m is the slope and b is the y intercept

y is how many bad on the shelf after x hours

y= 9x +7

Answer 2

Here, x represents the number of hours and f(x) represents the number of customers has checked out.

As per the given statement:

She stocks 9 large bags of cat food per hour.

⇒Number of stock after x hours = 9x

It is also given that there are already 7 large bags on the shelf when she started working.

⇒
`7 + 9x`

then; a function rule is given by:

`f(x) = 9x+ 7`

Therefore, a rule for the number of customers Abby has checked out after x hours is,
`f(x) = 9x+ 7`