Answer:

Explanation:
Given:
The given equation is.

Where:
y represents the distance in miles,
x represents the speed of the train in miles per hour, and
t represents the time travelled from the departing station in hours.
y = 162 miles
t = 3 hours
Solution:
The given equation is.

Rewrite the given equation for x or speed.
Substitute y and t value in above equation.


Therefore, the speed of the train is
.