The question is to find the acceleration of a certain section of a velocity-time graph, state its acceleration, if its speeding up or slowing down, and to state if its going north or south. (It states North = Positive) I was fine answering all of the questions until it went under the x axis. | | | |______________ |\ | \ | | Something like that, now, because acceleration is a vector, and i include the fact that it is going South. Does the answer need to be a negative. I know for a fact that the slope is 12 m/s^2, so do i write the answer as 12m/s^2 Increasing speed, moving South Or as - 12m/s^2 increasing speed, moving south Because in my mind, - 12 m/s^2 moving south, seems like a double negative, like for position (12 m [N] is the same as - 12 m ).