Mark is painting a room with 480 ft2
of paintable surface. He paints at an
average rate of 80 ft2 per hour for 2 h.
then takes a one-hour break. After
the break, he continues painting at an
average of 80 ft2 per hour.
t = time since painting started (h)
A = surface area not yet painted (ft?)
t
A
5001
0
400
1
H н
2
300
Area Not Yet Painted (A2)
3
S
200
4
5
100
6
R
7
0 1 2 3 4 5 6 7
Time (h)