## Determine whether quantities vary directly or inversely and find the constant of variation. How much does 3.25m of silk ribbon cost if 0.8m

Question

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.Morbi adipiscing gravdio, sit amet suscipit risus ultrices eu.Fusce viverra neque at purus laoreet consequa.Vivamus vulputate posuere nisl quis consequat.

## Answers ( No )

we are given

0.8m of silk ribbon costs $5.60

now, we can find cost of 1m of silk ribbon

so, we can divide both sides by 0.8

1 m of silk ribbon cost =

1 m of silk ribbon cost =

Let’s assume amount of silk ribbon as x

Let’s assume cost of silk ribbon as y

so, we will also get

so, we can see that

These quantities vary directlynow, we can compare it with

where k is constant of variation

so,

The constant of variation:Cost at 3.25m:we can plug x=3.25 and find y

So, the cost of 3.25m silk ribbon is $22.75……..Answer$22.75 is the answer..

3.25 / 0.8 = 4.06 * $5.60 = $22.75

I hope this helped ðŸ™‚