Answer:
It would decrease.
Explanation:
I would prefer to do this while looking at the graph.
If a disease killed most of the snowshoe hares, the lynx population would decrease.
It can be inferred that lynx eat hares. If hares die the lynx have less food to eat. With less food to eat, some of them die off and they reproduce less, causing the population to decrease.
Although, it is not that the lynx entirely depend on eating hares only, and it is not that all the hares are extinct. Therefore, the lynx would not become extinct.