1. The problem statement, all variables and given/known data The graph shows acceleration versus time of a particle moving along the x axis. Its initial velocity is 8m/s at t=0. What is the particle's velopcity at t=4s? http://img259.imageshack.us/img259/6684/graphcc9.jpg [Broken] 2. Relevant equations 3. The attempt at a solution vi=8 ti=0 vf=?? tf=4 I was thinking of integrating y=-x+4 but I don't think I'm suppose to do that and also I don't know how to find +c.