x Turn on thread page Beta
 You are Here: Home >< Maths

# HELP!!!! watch

1. Given that y is inversely proportional to x and that y=50 when x=2

find an expression for y in terms of x
2. (Original post by katie.daviesx)
Given that y is inversely proportional to x and that y=50 when x=2

find an expression for y in terms of x

If y is inversely proportional to x then

y α k(1/x)
y = k(1/x)
y = k/x

Spoiler:
Show

Sub in y and x to find k

y = k/x
50 = k/2
k = 100

Therefore y = 100/x

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: January 22, 2015
Today on TSR

### University rankings 2019

Cambridge at number one

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams