Roberto is having his house painted. The job takes three days, and he pays the painter the same hourly rate
every day. The cost of the job is in the chart below.
Day 1
Day 2 Day 3
Hours worked
5
4
6
Amount paid
$300
$240
$360
What is the painter's unit rate of change of dollars with respect to time; that is, how much is the painter paid for
one hour worked?
The unit rate of change is
dollars per hour.
Graph the proportional relationship described above, with the x-coordinate representing hours worked, and
the y-coordinate representing amount paid in dollars.
y
SO-