Slowing down or decelerating
If you want the graph to show the acceleration of the ball against time, then the graph is a horizontal line. If you want the graph to show the velocity of the ball against time, then the graph is a straight line sloping downward. If you want the graph to show the height of the ball against time, then the graph is a parabola that opens downward.
An upward sloping straight line indicates that the object being studied is moving away from the origin and that the component of its velocity in the radial direction is a constant. A downward sloping line indicates it is moving towards the origin. However, neither line says anything about the transverse component of its motion.
If you are analyzing speed with respect to time, then you are decelerating.
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An Upward Sloping Straight Line. <3
A straight line, through the origin, sloping up from left to right. The gradient of the graph will be the constant of proportionality.
A straight line graph with negative slope slants downward from left to right.
An upward sloping straight line.
This means your velocity is decreasing with time, or in other words, the object is slowing down.
If the graph is a straight line through the origin, sloping upwards to the right, then it is a proportional linear relationship.
On a graph of acceleration vs. time, during deceleration the line is below zero. On a graph of speed vs. time, during deceleration the line has a negative slope (sloping downward from left to right).
An Upward Sloping Straight Line. <3