Performance Task After filling the ketchup dispenser at the snack bar where she works,
Kelley measures the level of ketchup during the
day at different hourly intervals.
5 h: 11 in.
8 h: 10 in.
11h: 8 in.
ketchup
mustard
mayonnaise
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 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 before closing time? Explain.