Question

How does the circumference of the circle vary with respect to its radius? What is the constant of variation?

a) inversely, 2π

b) directly, 2π

c) directly, π

d) inversely, π

Answer 1

where is the part you don't understand?

Answer 2

I don't understand the question and what is it asking?

Answer 3

ok, so i could reword it like this:
if the radius gets bigger what happens to the circumference?

Answer 4

It will get bigger

Answer 5

what is the formula for circumference of a circle?

Answer 6

what never changes in that formula no matter how big of a circle you have?

Answer 7

C=2π * r

Answer 8

y = kx ==> y varies directly with respect to x. k is the constant of variation.
y = k / x ==> y varies inversely with respect to x. k is the constant of variation.

Answer 9

π will not change so the answer is c) directly, π

Answer 10

ranga I know the answer to this question and you just semi confused me lol

Answer 11

good job j

Answer 12

C = 2(pi)r

Compare it to y = kx where y varies directly with respect to x and k is the constant of variation.

C varies directly with respect to r and the constant of variation is 2(pi)

Answer 13

you with your fancy words, honestly I look forward to when that is intuitive.

Answer 14

But jm said the answer was c) and you, ehuman, said it was correct.
I am saying the answer is b).

Answer 15

be darned if I wasn't thinking of area. @jmartinez44 take a look at this one more time

Answer 16

very good catch @ranga

Answer 17

circumference is 2pir
I had pir^2 on my mind so jumped on your answer, 2pi is the constant.

Answer 18

np @ehuman.

Answer 19

Thankyou both