Answer:
The correct option is 1. The atmospheric pressure is 8 g/mm² at sea level.
Step-by-step explanation:
In the given graph y-axis represents the atmospheric pressure, in grams per square millimeter, and x-axis represents the altitude in miles above sea level.
The y-intercept of the graph is 8. It means the atmospheric pressure is 8 g/mm² when the altitude above sea level is 0.
Therefore atmospheric pressure is 8 g/mm² at sea level and option 1 is correct.
The graph represents a decreasing function.
As the altitude in miles above sea level increases the atmospheric pressure decreases and vice versa.
As the altitude in miles above sea level increases without bound the atmospheric pressure approaches 0 g/mm².
Therefore options 2,3 and 4 are incorrect.
