Use the regression equation that you found in Exercise 4 to predict the average annual salary of elementary school teachers when the average annual salary of secondary school teachers is $52,500.

Use the data in the table, which shows the average annual salaries (both in thousands of dollars) for secondary and elementary school teachers, excluding special and vocational education teachers, in the United States for 11 years.

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Secondary school teachers, x Elementary school teachers, y 51.2 48.7 52.5 50.0 54.4 52.2 55.2 53.2 56.0 54.3 56.8 55.3 57.8 56.1 58.3 56.3 56.8 59.3 57.7 60.4 61.4 59.0