How can you tell if a graph has a direct relationship and an inverse relationship?
If the graph shows a direct relationship, then the line will go
up. If it shows an inverse relationship, the line will go down.
A direct relationship means that as one variable increases, so
does the other. On a graph, this means that as we move out along
one axis, we also move out along the other.
An inverse relationship means that as one variable increases,
the other one decreases. So, for example, as we move to the right
(X increasing), we have to move down (Y decreasing).