Please help! thank you!

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Answer! if you don’t mind, can you explain

The equation represents the function f, and the graph represents the function g. f(x)=3(5/2)^x determine the relationship between the growth factors of f and g. a. the growth factor of g is twice the growth factor of f. b. the growth factor of f is twice the growth factor of g. c. the growth factor of f is 2.5 times the growth factor of g. d. the growth factor of f is the same as the growth factor of g.