What is the slope of the line passing (-3 ,4) and (2, -1)?

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 do i do this activity, is appreciated

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?