Suppose you increase your walking speed from 6 m/s to 12 m/s in a period of 2 s. what is your acceleration?

In this question , it is given that, you increase your walking speed from 6 m/s to 12 m/s in a period of 2 s.

And the formula of acceleration is  the ratio of change in velocity and change in time, that is

Substituting the values in the formula, we will get

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap