If f(x) varies directly with x, and f(x) = 18 when x = 2, find the value of f(x) when x = 6.

A.
6

B.
18

C.
36

D.
54

Question

If f(x) varies directly with x, and f(x) = 18 when x = 2, find the value of f(x) when x = 6.
 
 A.
6
 
 B.
18
 
 C.
36
 
 D.
54

gamereternity · Answer

plz help only 5 mins left will fan and medal

freckles · Answer

if u varies directly with v then u=k*v
where k is a constant


if u varies directly with v then u=k/v
where k is a constant

freckles · Answer

So here you have f(x) varies directly with x
can you setup the equation based on what I have above

gamereternity · Answer

i did so is c answer then

gamereternity · Answer

thats what i got

freckles · Answer

What did you get for the constant k after you setup the equation?

directrix · Answer

>> i did so is c answer then

I think that is not correct.     @gamereternity