Some good advice ITT!
I would approach it similar to how you would approach a regular novel, except now you're directing a lot of your analysis to images instead of prose. Think "a picture paints a thousand words", right? Well, now you don't have thousands of words that paint a picture to analyse - you've just got the picture painted for you instead

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The only graphic narrative (definitely graphic narrative, and not graphic novel if you want to be particularly correct) I've had experience analysing was
Persepolis. I'll use that text for the sake of my examples because I haven't read yours. To give you a hyper-brief summary,
Persepolis is basically the life story of a girl who grew up during the war in Iran.
So... whenever she drew women with the hijab on, there was a lack of detail in their faces, and all were drawn postured the same. You can approach this similar to a regular novel, in that in a regular novel you could say "ah, this body of text symbolises xyz". Here, we can say "Ah, this image of women with hijabs on symbolises the fact that, in the author's view, the hijab is oppressive and robs women of their individuality and identity". And we get this symbol from the way she draws characters in the hijab, as opposed to how she draws them in their home in casual clothing (highly individualised features).
In my text, she also drew the uniforms of soldiers similar to Americanised uniforms instead of the Iranian war uniform... perhaps this was to make images of war more relatable to a Westernised audience (who happened to be her target audience).
As an extension to what and how they're actually drawing, consider any use of boarders, or the gap between slides, how many slides are on a line - or is one slide an entire page? Consider the use of black and white space - how dominant is each shade in the various slides?
You're still looking for the views and values of the author, as well a symbols and motifs and all that stuff - basically trying to garner meaning from the text in the same way you would a novel, you just have different stimulus material to garner meaning from.
To incorporate it in the text response... Well, you'd just say what you had to say, as concisely and clearly as possible. "Satrapi's depiction of women in the hijab condemns the oppressive nature of the garment.... etc etc"
Don't get TOO stuck up on making notes, either (whilst they can be quite helpful for many).
Glhf
