Find the maximum rate of change of f at the given point and the direction in which it occurs. f(x, y) = 9 sin(xy), (0, 8)

The magnitude is  

The  direction  is   i.e toward the x-axis

Step-by-step explanation:

From the question we are told that

   The function is  

    The point considered is  

Generally the maximum rate of change of f at the given point and the direction is mathematically represented as

At  

g

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.