Find the maximum rate of change of f(x, y)=ln(x^2+y^2) at the point (3, 1) and the direction in which it occurs. Maximum rate of change: ?

Direction (unit vector) in which it occurs: ⟨ ? , ? ⟩

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.