Two number cubes are tossed.
What is P(4, 6)?

100 feet below sea level

Step-by-step explanation:

Our function is

This is written in vertex form,

f(x) = a(x-h)²+k,

where (h, k) is the vertex of the function.

The vertex of a function is either the maximum or the minimum value of a quadratic function.

For our function, the value in place of h is 60 and the value in place of k is -100; this makes the vertex

(60, -100).

This means at 60 seconds, the diver will reach a minimum of -100 feet, or 100 feet below sea level.