Final answer:
To express the distance Kieran walked in miles as a function of time in minutes, use the equation d = (1/15)t, where d is the distance in miles and t is the time in minutes.
Step-by-step explanation:
The student's question about Kieran walking 1 mile in 15 minutes pertains to determining a linear equation that represents the relationship between distance d in miles and time t in minutes. In this context, to express the distance d in terms of time t, we use the rate of Kieran's walking. Since Kieran walked 1 mile in 15 minutes, the rate is 1 mile/15 minutes = 1/15 miles per minute. The equation describing this relationship is d = (1/15)t, where d is the distance in miles and t is the time in minutes.