Final answer:
The graph of a function that shows constant percentage decay is concave downward, not concave upward.
Step-by-step explanation:
The graph of a function that shows constant percentage decay is concave downward, not concave upward. Concave upward means that the graph is bending upwards, like a smiley face, while concave downward means that the graph is bending downwards, like a frowny face. So the statement is false.