Ypsilanti Market Research conducted a survey to find out whether people who earn more money purchase more expensive goods. The following graph indicates the relationship between income the survey subjects earned and the price of the car that they purchased. 2 50 45 40 38 30 PRICE (Thousands of dollars per car) 25 20 15 TO 5 0 10 90 100 20 30 40 50 60 70 B0 INCOME (Thousands of dollars per year) 25 20 PRICE (Thousands of d 15 10 5 O 10 20 30 40 50 60 70 00 INCOME (Thousands of dollars per year) 00 100 The variable shown on the vertical axis is price The units for the variable on the horizontal axis are thousands of dollars per year There are two ways to view the information presented on the graph. First, the graph tells us the amount a person with a certain income is likely to spend on a car, and second, it tells us the probable income of a person who spent a certain amount on a car. For example, if an individual earned $50,000 last year and purchased a new car, you would expect that person to have paid about for the car. Similarly, if someone just paid $20,000 for a car, you could use this graph to estimate that this person's income was probably around