Question

If x and y vary inversely, and y =6 when x=7, what is the constant of variation

Answer 1

Answer: k = 42

Explanation:

Formula =
`y = (k)/(x)`

plug in values:

6 =
`(k)/(7)`

multiply both sides by 7

k = 42

Answer 2

x alpha 1/y

: Introducing a constant k

x = k/y

where x = 7, y= 6

7 = k / 6

Cross Multiply

K ( constant) = 42