How many hours of training would you need to have a salary of $2,000? Hours of Training 10 20 30 40 50 60 70 Monthly Salary 1100 1200 1300 1400 1500 1600 1700

The maximum depth that he will reach is -125 meters.

The first thing you should realize is that this is a quadratic equation and the graph will be a parabola.

We can simply the equation to:

y = (1/20)x^2 - 5x

Now, use -b/2a to find the x-value of the vertex which is 50. Then, input 50 back into the equation to get -125 for the maximum depth.