Answer:
Remember that the maximum rate of change of f at a point u is the length of the of the gradient vector evaluate in u, and the direction in which it occurs is in direction of the gradient vector evaluate in u.
The gradient vector of f is

Then, the maximum rate of change is
in the direction of (5,8).
Answer:
positive
Step-by-step explanation:
negative slopes go from right to left; this line goes from left to right
0; the line isn't completely horizontal
undefined; the line isn't completely vertical
9 divided by g to the power of 3
The z-score is 3, because 294-210=84; 84/28=3