Question

Variable y varies directly with variable x, and y = 18 when x = 4.
What is the constant of variation in decimal form?

Answer 1

direct variation is y = kx where k is a constant to be found

Answer 2

Plug in your 2 values and find the value of k

Answer 3

Huh i'm not really good at math can you dumb it down a little

Answer 4

2*9=18

Answer 5

@welshfella

Answer 6

so whats the decimal form

Answer 7

0.9?

Answer 8

sorry - I lost it then
y = kx

y = 18 when x = 4
so plugging in theses values

18 = k*4

now to get k on its own you divide each side of the eqaution by 4:-
18/4 = 4k / 4
18/4 = k

Answer 9

so whats k? I'm confuzed

Answer 10

@welshfella

Answer 11

k is the constant of variation which you are trying to find

all you need to do now is divide 18 by 4 and you have it

k = 18/4 = ?

Answer 12

4.5?

Answer 13

yes