A walker moves counterclockwise around a circle with center (1.5, 2) and radius 1.2 m and completes

Question:

A walker moves counterclockwise around a circle with center (1.5, 2) and radius 1.2 m and completes a cycle in 8 s. A recorder walks back and forth along the x-axis, staying even with the walker, with a motion sensor pointed toward the walker. What equation models the (time, distance) relationship? Assume the walker starts at point (2.7, 2).