X/4+10=1 pls help me!

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 lines can be drawn through points j and k? 0 1 2 3

Which of the following describes the symmetry of the graph of y = x3?