A graph that shows speed versus time is not an acceleration graph.The slope of the graph at any point is the acceleration at that time.A straight line shows that the acceleration is constant.
Any graph that isn't a straight horizontal line is a graph of speed with acceleration.
That the force that causes the acceleration is not constant.
Indirectly, yes. If the graph is a straight line there is no acceleration, if the graph is not linear there is acceleration.
The slope of a velocity-time graph is acceleration. If it is a straight line, then it is the average acceleration. Force is not part of the velocity-time graph.
The gradient of the tangent to the velocity-time graph at any point is the acceleration at that point. If the v-t graph is a straight line then the gradient of that line is the acceleration.
no because it is possible the object moving make go backwards so the the line will go into the negatives on the graph
If the graph is a straight line, then the slope of the line is the average acceleration of the ball.
This depends on what the graph represents. If it is a graph of velocity on the vertical and time on the horizontal, then if acceleration is at a constant rate, the graph will be a straight line with positive slope (pointing 'up'). If acceleration stops, then the graph will be a horizontal line (zero acceleration or deceleration). If it is deceleration (negative acceleration), then the graph will have negative slope (pointing down).
Acceleration is 0.
a horizontal line :)
With a straight line.