I devised a circuit where I could change the resistance as well as measure the current and by how much a length of nicrome wire heated up a certain amount of water by in ten minutes.

However I messed up and lost my results. I know that a graph of temperature change and current should not be a straight line and that you need to do a conversion to do with power to get directly proportional results.

Could anybody tell me the conversion I need to do and give me some ready made results of current and temperature that will work out after the conversion. Bearing in mind that I need 5 results and I used a 6 v battery.

I am very grateful for any help.