Question

amount consumed each trial
time (sec)
which term describes
what is happening in
the amount per trial
vs. time graph?
a constant amount
is eaten.
a negative amount
is eaten.
nothing is
consumed.
a changing amount
is eaten.

Explanation:

Step1: Analyze the graph

The graph is a straight line with a negative slope, showing that as time (x - axis) increases, the amount consumed per trial (y - axis) decreases.

Step2: Evaluate each option

• Option A: A constant amount would be a horizontal line (slope = 0), but the graph has a negative slope, so this is incorrect.
• Option B: "Negative amount" doesn't make sense in terms of consumption (amount can't be negative in this context), so this is incorrect.
• Option C: The graph shows a change in amount over time (decreasing), so "nothing is consumed" is incorrect.
• Option D: The amount is changing (decreasing) as time passes, so this option is correct.

Answer:

D. A changing amount is eaten.