I need, to specify my own parameters (X and Y axis values) as well as my line
values.

For example, I have my x axis = Temp
Series (lines) are values I measured at a specific temp to give me a
measurement on a specific scale.

They Y axis is the scale I need but it has ranges. For example 50-90 is one
scale and 10-45 is another scale which has a higher value than the previous
scale.

My measurements cross over between both scales. Therefore I need to specify
my y values myself.