canonical analysis plot interperation

[#1]

Hi, I have a question about the canonical analysis. What do the black, red and blue lines exactly mean in the figure? 

Thank you very much!

[#2]

This picture looks like the Prediction Profiler. The vertical dotted lines represent the current value of each independent variable. The horizontal dotted lines represent the dependent variable predicted by the model. The solid line is a 'profile' that shows how the dependent variable is related to the independent variable, holding the other independent variables fixed. The dashed lines that surround the solid line are point-wise confidence intervals on predicted value.

The the help for the Prediction Profiler.

[#3]

Hello! I feel a bit confused. The discriminant analysis with its canonical plot can be considered as a CVA (Canonical Variate Analysis) or it is a different technique? For example, I have spectral data analyzed by PCA and I ran also via discrminant analysis. Not sure, if it was correct. Thanks for the consultation!