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

To find the constant of variation, you must use the following equation:

y = kx

'k' is the constant of variation.

y = 18
x = 4
k = ?

18 = k(4)
18/4 = k
k = 4.5

The constant of variation is 4.5

No because if you do the higher number minus the lower number you will get a positive. if you do it the other way around you will get a negative number