Plot 3 variables on 2D plot

I have three variables that are stored like this:

The growth in rated power when adding EVs for the combination of 1,2,3...36 households

AAG: 36x1 cell that contains 36 1x1000 cells, every of these cells contains 1x1000 double

(This variable I want on the yaxis)

The number of households that are combined: 1-36

(This I want on the x-axis)

How many inhabitants in total the combination has

AAI: 36x1 cell containing 36 1x1000 double

(This I want represented as a color scale)