chart.js Tutorial - Line Chart

I have an excessive quantity of meteorological measurements, (value / date) using chartjs I get the dates in total disorder (piled up). Could you help me with some tip?

Any ideas on how to plot an equation? I'm guessing I'd need to automatically generate values in the array using the equation? Anybody know the code I could use for plotting say y = 4x + 2 ?

Thank you very much! Very useful tutorial!

dem music tho