Question

How does g vary with height and depth?

Answer 1

g means gravitation.It varies as height decrease the gravitational force and dept increase the gravitational force.

Answer 2

yes it varies with height and depth. as the formula of gravitation is 
G*m1*m2/the square of the distance between m1 and m2.
as the distance increases,the g decreases and also when the distance decreases ,the g decreases as when we get inside the earth,the mass of the also decreases and the formula becomes Gm1m2r/R³ where r is the depth,R is radius of earth.