Answer: The range of a function refers to the set of all possible output values, or y-values, of the function. In this case, we have a graph on the t-s axis with two points: (7, 20) and (12, 100).
To find the range, we need to determine the possible values for the y-coordinate, which is s in this case. The lowest value for s is 20, which corresponds to the point (7, 20). The highest value for s is 100, which corresponds to the point (12, 100).
Therefore, the range of the function in the graph is 20≤s≤100.
Option C, 20≤s≤100, is the correct answer.
This means that any value of s between 20 and 100, inclusive, is within the range of the function represented by the graph.