How is acceleration calculated?
-acceleration equals the change in velocity divided by time
-acceleration equals distance divided by time
-acceleration equals speed multiplied by time
-acceleration equals velocity

Acceleration equals the change in velocity divided by time.

That's the "time rate of change" of velocity.

d is the answer i came up with

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )