A researcher wishes to examine the relationship between years of schooling completed and the number of pregnancies in young women. Her research discovers a linear relationship, and the least squares line is: y^=5-2x where x is the number of years of schooling completed and y is the number of pregnancies.The slope of the regression line can be interpreted in the following way:

• When amount of schooling increases by one year, the number of pregnancies tends to increase by 2.
• When amount of schooling increases by one year, the number of pregnancies tends to decrease by 5.
• When amount of schooling increases by one year, the number of pregnancies tends to decrease by 2.
• When amount of schooling increases by one year, the number of pregnancies tends to increase by 5.