What conclusions can I draw from this graph?

I've been doing an experiment where we would have copper chloride in an aqueous solution, and then mix aluminium foil in it which produces copper. We then modified that experiment to do the same thing, but investigate the yield of copper with the solution at 10°C, 24°C, 30°C and 50°C.


I expected it to be a linear trend, with copper increasing as you increase in temperature, but with our results, I got this trend:


[![Yield Of Copper Over Varying Temperatures of Copper Chloride](https://i.stack.imgur.com/B0Mzh.png)](https://i.stack.imgur.com/B0Mzh.png)


My research question is this: 'How does changing the temperature of an aqueous solution of copper chloride (at 50°C, 30°C, 24°C and 10°C) in a reaction with aluminium affect the reaction rate and hence result in a greater yield of copper in grams?'


In my conclusion, I need to provide an answer to my research question and link **scientific theory to my results**. I'm not quite sure how I'm supposed to do that with the results I've got.


Thanks in advance for your help.


