velocity (2.1)
magnitude and direction an object is traveling (also the slope of distance/time)
Velocity is defined as the rate at which an object changes its position in a particular direction with respect to time. It is a vector quantity as it has both magnitude (speed) and direction. For example, if a car moves 50 km/hr towards north, its velocity would be 50 km/hr towards north. The equation for velocity is:
velocity (v) = change in displacement (Δx) / change in time (Δt)
Where Δx denotes the change in the position of an object (displacement) and Δt denotes the change in time. Velocity is measured in units of distance / time, such as meters/second, kilometers/hour, or feet/minute, etc.
It is important to note that velocity and speed are related but not the same thing. While speed is the rate at which an object moves, velocity takes the direction of motion into account as well.
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