The table represents a proportional realationship with the number of nails in boxes. What are the unknown values representating the unit rate?

Which function is shown in the graph below?

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

How many days was the temperature above 90 degrees?