Question

5.4.2 test (cst): computer-scored unit test
graph: year (2010, 2015, 2020, 2025, 2030) vs percentage of trees remaining (100, 80, 70, 53, 10)
what would a graph of carbon dioxide absorption look like for this forested area?
a. an increasing line
b. a line that goes up and down
c. a flat line
d. a decreasing line

Explanation:

Trees absorb carbon dioxide. The given graph shows the percentage of remaining trees decreasing over time (from 2010 to 2030, the percentage drops: 100→80→70→53→10). As the number of trees decreases, carbon dioxide absorption should also decrease. So the graph of carbon dioxide absorption should mirror the trend of tree percentage, which is a decreasing line.

Answer:

D. A decreasing line