To determine the slope of the line representing the data in the table, we can analyze the trends in the two columns. As the number of cards sold increases (10, 20, 30, 40, 50), the remaining amount of money needed decreases ($875, $795, $715, $635, $555).
This indicates a negative relationship between the number of cards sold and the remaining money needed. Therefore, the word that describes the slope of the line representing the data in the table is:
negative.