The distance in kilometers, d, expressed as a function of time in hours, t is d = 3t km
From the question,
A pedestrian is walking at a speed of 3 km/h.
To express the distance in kilometers, d, as a function of time in hours, t
We will use the formula connecting speed, distance and time.
The formula connecting speed, distance and time is
[tex]Speed =\frac{Distance}{Time}[/tex]
Let speed = s
distance = d
and time = t
∴ We can write that
[tex]s = \frac{d}{t}[/tex]
Since the given speed, s = 3km/h
Then, we can write that
[tex]3 =\frac{d}{t}[/tex]
Then, the distance, d expressed as a function of time, t will be
d = 3t km
Hence, the distance in kilometers, d, expressed as a function of time in hours, t is d = 3t km
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