If y varies directly as x and y is 12 when x is 1.2, what is the constant of variation for this relation? .

Hello,

y=k*x ; if x=1.2,y=12
==>12=k*1.2==>k=12/1.2==>k=10

From the question, we now that y is 12 when x is 1.2

in order to find out the constant of variation for this relation, we just need to substitute it to :

y = k x

12 = k 1.2

k = 12/1.2

k = 10

hope this helps

Bis the correct answer