HEL The results of an analysis, on the makeup of garbage, done by the Environmental Protection Agency was published in
1990. Some of the results are given in the following table, which for various years gives the number of pounds per person
per day of various types of waste materials.
1960
1988
1970
10.34
Waste materials
Glass
Plastics
Metals
Paper
0.20
10.01
10.32
10.08
1980
10.36
10.19
10.35
1.32
10.28
10.32
10.34
0.38
(1.19
10.91
1.60
For glass, calculate the average rate of change between 1970 and 1980. Then interpret what this value means.
a. From 1970 to 1980, the number of pounds of c. From 1970 to 1980, the number of pounds of
glass per person per day decreased by 0.002
glass per person per day increased by 0.002
per year.
per year.
b. From 1970 to 1980, the number of pounds of d. From 1970 to 1980, the number of pounds of
glass per person per day decreased by 0.11 glass per person per day increased by 0.11
per year.
per year.