direct variation

Question

if y = 12 when x =3 , find y when x = 7

Answer 1

y = kx

Since y = 12 when x = 3, we have:

12 = k(3)
k = 12 / 3
k = 4

Thus, y = 4x

When x = 7, we have:

y = 4(7)
y = 28

Answer 2

idk pleraaaaaseee tell me

Answer 3

do you have to round if you get a decimal in direct varitation

Answer 4

y=9.92 when x=3 2/3

Answer 5

keplers third law states that in the solar system,the square of the peroid of a planet varies directly as the square of its mean distance from the sun;the mean distance of the earth from the sun is 92.9 million km and its period is 1 year . Find the period of venus whose mean distance from the sun is 67.2 million km.

Answer 6

y=28

Answer 7

k= 12/3

k= 4

y= (4)(7)

y= 28