Here’s my work to your question!
Answer:
115,571,923,290.8
this is the answer will u mark me as brainlist

has gradient

which at the point (-1, 4, 3) has a value of

I'm not sure what the given direction vector is supposed to be, but my best guess is that it's intended to say
, in which case we have

Then the derivative of
at (-1, 4, 3) in the direction of
is

Equations that represents a linear function are Answers A and D
8-2(6-4:2)
8-2(6-2)
8-2*4
8-8=0