Hello guys, I am having a hard time understanding velocity vs time graphs. In one of my homework problems I was given a velocity vs time graph and asked to find the average speed in a time interval of 9 seconds. I am unsure how to go about this. Also, how would I find displacement at a certain time given a velocity vs time graph? Any help would be greatly appreciated. I have uploaded the graph as well so that you guys can know what I'm talking about.