y is inversely proportional to d2 when d = 10, y = 4 d is directly proportional to x2 when x = 2, d = 24 Find a formula for y in terms of x. Give your answer in its simplest form.

y=k/d2
substituting:4=k/102
4=k/100
400=k
d=nx2
substituting:24=n x 22

24=4n
n=6
Eq1:y=400/d2
Eq2:d=6x2
y=400/(6x2)
y=400/36x4
y=200/13x4

AI
Answered by Abi I. Maths tutor

13273 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Functions question: f(x) = 3x + 2a; g(x) = ax + 6; fg(x) = 12x + b. a and b are constants; Work out the value of b


Gemma has the same number of sweets as Betty. Gemma gives 24 of her sweets to Betty. Betty now has 5 times as many sweets as Gemma. Workout the total number of sweets that Gemma and Betty have.


I struggle with time management whilst doing an exam paper. How will I be able to answer every question in the time given for the exam?


how do you find the equation of a line perpendicular to another line at a point?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning