Final answer:
To evaluate the function for an input of 3 in Sam's rowing distance from the dock, we need to find the corresponding y-value on the graph where the line intersects the x= 3 line.
Step-by-step explanation:
The question is asking to evaluate the function for an input of 3. From the given information in the graph, we can see that the distance from the dock is represented on the y-axis and time is represented on the x-axis. To evaluate the function for an input of 3, we need to find the corresponding value on the y-axis at x = 3. We can do this by looking at the graph and finding the point where the line intersects the x = 3 line. Then, we read the corresponding y-value, which gives us the distance from the dock at x = 3.