Question

How do you draw a velocity graph from an acceleration graph?

Answer 1

integrate the acceleration function to get the velocity function and then plot it

Answer 2

The answer is surely correct.
Anyway, 4farhan4 probably refers to a graphical solution.
As I depicted in the figure below, you can "estimate" the velocity function behaviour following these steps:
1. establish a base line (dotted line) as reference;
2. choose the time interval for your "graphical" integration;
3. first point of v is the distance of a curve and the base line; 4. the second point is the distance of v plus the distance of the previous point;
5. repeat the method of the previous step for the next points

Answer 3

using matlab

Answer 4

first draw the co-ordinate axis x and y.
now analyse three things and you will be able to draw velocity graph..
1- see for very small time interval if acceleration is constant then at that interval velocity will increase but if acceleration is increasing then velocity will increase but more rapidly.
2-if acceleration is decreasing then also velocity will increase till it becomes zero but less rapidly.
3- if acceleration is zero then velocity will be constant.
by analyzing these thing you can draw velocity graph..