Hi,
I'm trying to learn direct and inverse proportions for GCSE Maths, however I can't get my head around it, it confuses me so much. Can anyone help me with it or direct me to a website which can, I've tried mathswatch and it doesn't make sense. Please help its annoying me! Thanks.
Here's an example question.
DIRECT PROPORTION
The time, T seconds, it takes a water heater to boil is directly proportional to the mass of water, m kg, in the water heater.
When M = 250, then T = 400.
Find T when M = 300.