If you are analyzing speed with respect to time, then you are decelerating.
The object is accelerating
A line sloping upwards in a distance graph indicates that the object is moving away from the starting point, and the distance from that point is increasing over time. The steeper the slope, the faster the object is moving. If the line is straight, the speed is constant; if it curves, the speed may be changing.
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.
The horizontal line represents that the acceleration is zero or constant speed and the line that slopes downward means that the object is slowing down and it is a negative acceleration.
This means your velocity is decreasing with time, or in other words, the object is slowing down.
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).
Slowing down or decelerating
Deceleration can be symbolized as a negative value in an equation or graph, indicating a decrease in speed or velocity. It can also be represented by a downward sloping line on a velocity-time graph, showing a decrease in velocity over time.
The object is accelerating
A line sloping upwards in a distance graph indicates that the object is moving away from the starting point, and the distance from that point is increasing over time. The steeper the slope, the faster the object is moving. If the line is straight, the speed is constant; if it curves, the speed may be changing.
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.
The horizontal line represents that the acceleration is zero or constant speed and the line that slopes downward means that the object is slowing down and it is a negative acceleration.
An downward sloping diagonal line on a position vs. time graph indicates constant negative acceleration or deceleration. This means that the object is moving in the negative direction and slowing down over time.
This means your velocity is decreasing with time, or in other words, the object is slowing down.
That the object being studied is accelerating in the radial direction.
That means the speed (the slope of the position-time graph) is decreasing.
If the speed-time graph shows a horizontal line, it indicates that the car is moving at a constant speed. Following this, a straight line that slopes downward indicates that the car is decelerating, meaning it is slowing down over time. The downward slope represents a decrease in speed until it eventually comes to a stop. This combination suggests that the car initially travels at a steady pace before gradually reducing its speed.