The technical writing is a more elaborate and formal text. It differs from literary essays, because they are objective and impartial, in addition to using denotative language.
In this type of writing the images must pass a message, either through graphics, that make the cold accuracy of the numbers something attractive, or in the development of an explanatory image, that will give life to concepts of a product or company. What is important is that these images work independently of the text.
I believe it is merely asking you to write down what the images remind you of. Like, maybe a childhood memory or something that happened recently or long ago. or maybe something you have seen :)
