A period of constant positive acceleration;a second period of zero acceleration;
a third period of constant negative acceleration.
Velocity change vs Time
The answer depends on the variables in the graph! In a graph of age against mass there is nothing that represents acceleration.
The graph of velocity-time is the acceleration.
The area under an acceleration-time graph is equal to the object's velocity (not change in velocity).
if there is a slope, the velocity is either increasing or decreasing. This is acceleration.
The slope of a velocity-time graph represents acceleration.
The Slope (which represents acceleration) of a constant velocity graph is Zero.
Magnitude of acceleration (but conveys no informationregarding acceleration's direction).
The slope of a velocity-time graph represents acceleration.
The slope of a velocity-time graph represents acceleration.
Velocity change vs Time
Velocity is NOT the slope of the acceleration vs. time graph. Velocity is the area under the acceleration vs. time graph. Velocity is the slope of a position vs. time graph, though. For you Calculus Junkies, v = the integral of acceleration with respect to time.
If your graph shows velocity on the vertical axis and time on the horizontal axis, then the slope of the graph represents the acceleration. More specifically, the slope of the graph at a specific point represents the acceleration at that instantaneous point in time. So if the slope of the graph doesn't change (i.e. the graph is a straight line), then the acceleration is constant and doesn't change over time. In calculus, this is represented as the derivative: The derivative of velocity with respect to time equals the acceleration.
A slanting line down from left to right represents an acceleration on the velocity time graph.
magnitude of acceleration at every point on the graph
The answer depends on the variables in the graph! In a graph of age against mass there is nothing that represents acceleration.
Your acceleration vs. Time graph is the slope of your velocity vs. time graph