Speed versus time

This can be confusing. It's about acceleration, deceleration and direction over time. The key is to notice that in A, the car is decelerating out of the box whereas in B, it is accelerating. Therefore, the answer is B.

Can you solve this question?

Can you find the pattern?

Mathematics is all about finding a pattern.

Check this out and you will grasp the concept:
http://www.wimp.com/mathriddle/