An object is thrown vertically into the air.Which of the following five graphs represents the velocity (v) of the object as a function of the time (t) ? The positive direction is taken to be upward. 
Definitions:
Forgetting Curve
A graph that describes the rate at which information is lost over time when there is no attempt to retain it.
Forgetting Rate
The speed at which information is lost from memory over time, an aspect of memory decay.
Intrusion Errors
Memory mistakes in which elements that were not part of the original information get mixed into (“intrude” into) someone’s recall.
Recall
The act of retrieving information or memories from the past, often without the stimulus that initially encoded the memory.
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