4. In a certain section of a city, muggings have been a problem. The number of police officers patrolling that section of the city has varied. The following chart shows the number of police officers...

Extracted text: 4. In a certain section of a city, muggings have been a problem. The number of police officers patrolling that section of the city has varied. The following chart shows the number of police officers and the number of muggings for 8 successive days. Police 20 12 18 15 22 10 20 12 officers Muggings 5 9. 10 8 6. 13 15 a) What is the explanatory variable? What is the response variable? b) What is the least squares regression equation? c) What is the correlation coefficient, r? d) What is the coefficient of determination, r2? Interpret this result. Interpret this result. e) Use the equation in part (b) to estimate the average number of muggings when 16 police officers are patrolling that section of the city