A car increases its velocity from 7.8 m/s to 11.4 m/s with constant acceleration. The average velocity of the car is
m/s. (Round to nearest tenth digit.)

9.6

Explanation:

Add initial and final velocities and divide by 2

11.4+7.8 = 19.2

19.2 / 2 = 9.6

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 : )

not moving. pos accel,