After filling the ketchup dispenser at the snack bar where she works, kelley mesaures the level of ketchup during the day at diffrent hourly intervals.
part a: assuming the ketchup is used at a constant rate, write a linear equation that can be used to determine the level of ketchup in the dispenser after x hours.
part b: how can you use the equation from part a to find the level of ketchup when the dispenser is full?
part c: if kelley fills the ketchup dispenser just before the restaurant opens, and the restaurant is open for 18 hours, will the dispenser need to be refilled by closing time? explain.