Answer:
A
Step-by-step explanation:
Speed is the rate of change of distance over time.
The equation represents the amount of time t is \mathbf{t = 5 d}t=5d
Speed is calculated using:
\mathbf{Speed = \frac{distance}{time}}Speed=timedistance
When distance = 1 mile, and time = 5 minutes.
We have:
\mathbf{Speed = \frac{1}{5}}Speed=51
When distance = d, and time = t
We have:
\mathbf{Speed = \frac{d}{t}}Speed=td
Substitute \mathbf{Speed = \frac{1}{5}}Speed=51
\mathbf{\frac{d}{t} = \frac 15}td=51
Cross multiply
\mathbf{t = 5 \times d}t=5×d
\mathbf{t = 5 d}t=5d
Hence, the equation represents the amount of time t is \mathbf{t = 5 d}t=5d
