Since the between the number of tickets and the total cost, including parking, the cost of one ticket is: D. $10.50
In order to determine an equation for the line of best fit or linear regression line that models the data points contained in the table of values, we would have to use a graphing calculator (Microsoft Excel).
Based on the scatter plot (see attachment) which models the relationship between the number of tickets and total cost, an equation for the linear regression line is given by:
y = 10.5x + 15
In this context, we can reasonably infer and logically deduce that the cost of one ticket is equal to $10.50.