Cars reading odometer and selling price Car dealer wants to find whether there is a linear relationship between the odometer reading and the selling price of the used cars. A random sample of 30 cars is selected, and data is collected on the odometer reading (in thousands of miles) and the selling price (in thousands of dollars) for each car. Develop a scatter plot of the data. Based on the scatter plot, does there appear to be a linear relationship between the odometer reading and the selling price?