Which of the following is a Recursive Formula for an Arithmetic Sequence? a1 = -3, an = an-1 + 6
an = -3 + 6(n – 1)
a1 = -3, an = 6an-1
an = 6n – 9

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.

F(x)=5/6x+3 which of the following is true

What is the value of x? enter your answer in the box.