To find the set fee for the house, we need to determine the y-intercept of the linear relationship between t and C.
Using the table given, we can find two points on the line: (0, C) and (t, C). The point (0, C) represents the y-intercept, which is the set fee for the house.
Looking at the data, we can see that when t=0 (i.e., no time spent at the house), the cost C is the set fee. So we can choose any C value where t=0 to get the set fee. From the data given, we see that when t=2.5, C=195.
Therefore, the set fee for the house is $195.