The equation q - 4.e(0.45 m) represents the area of a wall a, in square feet, that is covered by mold m months since the mold was first spotted. The area of
the wall is 80 square feet.
Use the graph representing f to estimate when the entire wall will be covered
in mold if it is not cleaned.
120
100
80
a (area in square feet)
60
40
20
1
2
6
7
8
3 4 5
m (months)