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8. Refer to Figure 2. What is measured along the vertical axis on the graph? a. the quantity of automobiles produced b. the price of automobiles c. the wage paid to automobile workers d. The quantity of automobile workers hired. 9. Refer to Figure 2. Which of the following explains the shift of the labor-demand curve from In the labor market for automobile workers? a. The wage earned by automobile workers increased. b. The price of automobiles increased. C. Firms are required to provide all workers with full health care insurance. d. The price robots to make cars decreased. 10. The effect of the Black Death in 14th-century Europe was to a. Increase rents earned by landowners. b. Increase wages earned by workers. c. increase income inequality between peasants and the landed classes. d. Both a) and b) are correct.