A car rental agency wants to study if there is a relationship between the miles traveled by compact cars, 'X' and the cost of monthly maintenance (Y). The data is as follows from 15 cars taken at random:

Miles (thousands) = X: 6 7 8 9 10 11 12 13 14 15 16 17

Cost (dollars) = Y: 13 16 15 20 19 21 26 24 30 32 30 35

Find: the Regression Equation, (graph and formula), the Correlation Coefficient r,

Find the cost if a car traveled 20 miles