Question

y varies directly as the square of R. if y=108 when R=6,find y when R=7??????

Answer 1

y=kR^2

Answer 2

uzma is right, 6^2=36
108/36=3
so k =3
when R is 7 y=3*7^2=147

Answer 3

k=108/36=3
y=49*3

Answer 4

y varies directly as the square of R. if y =16 when R=2 find y when R=7

Answer 5

just put the values

Answer 6

ok so what i have is y=kR^2 which would bring me out to R=7^2 which would be 49 which means y=k49 but then im lost I SUCK AT MATH AND i have a hard time comprehending how thigs work

Answer 7

k=16/4=4
y=49*4

Answer 8

ok i see now