Question

amount consumed each trial vs. time (s)
t = 0 s, 8 items eaten
t = 4 s, 6 items eaten
which phrase describes what is happening in this graph?
a changing amount is eaten. nothing is consumed.
a constant amount is eaten. a negative amount is eaten.

Explanation:

The graph shows the amount consumed over time. At t=0s, 8 items are eaten, and at t=4s, 6 items are eaten. The line is decreasing, meaning the amount eaten is changing (decreasing). "Nothing is consumed" is wrong as the amount changes. "A constant amount" would be a flat line, but here it's decreasing. "A negative amount" doesn't make sense as we can't eat a negative number of items. So the correct description is that a changing amount is eaten.

Answer:

A. A changing amount is eaten.