[ellie2996]

Hiya I urgently need help from anyone with this maths problem, I've done it but the answer doesnt look right to me...please help!

'y is directly proportional to x^2 and y=9 and x=6.
Express y in terms of x'

[TenOfThem]

what have you done

what did you get

[ellie2996]

y = kx^2

9=k x 6^2

9=36k

9/36=k

0.25=k

y=0.25x^2

[raheem94]

(Original post by ellie2996)
Hiya I urgently need help from anyone with this maths problem, I've done it but the answer doesnt look right to me...please help!

'y is directly proportional to x^2 and y=9 and x=6.
Express y in terms of x'

What answer do you get?



Use the information, y=9 and x=6, to find 'k'.

[raheem94]

(Original post by ellie2996)
y = kx^2

9=k x 6^2

9=36k

9/36=k

0.25=k

y=0.25x^2

Its correct according to me.

[TenOfThem]

(Original post by ellie2996)
y = kx^2

9=k x 6^2

9=36k

9/36=k

0.25=k

y=0.25x^2

That is correct

[ellie2996]

I got y=0.25x^2 but I don't know if that is correct

[ellie2996]

Okay thank you