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 Officers 20 12 18 15 22 10 20 12
Muggings 5 9 10 8 6 13 7 15
What is the explanatory variable?
What is the response variable?
What is the least squares regression equation?
What is the correlation coefficient, r? Interpret this results.
What is the coefficient of determination, r2? Interpret result.

In new york city at the spring equinox there are 12 hours 8 minutes of daylight. the longest and shortest days of the year very by two hours and 53 minutes from the equinox in this year the equinox falls on march 21 in this task you use trigonometric function to model the hours of daylight hours on certain days of the year in new york city a. what is the independent and dependent variables? b. find the amplitude and the period of the function. c. create a trigonometric function that describes the hours of sunlight for each day of the year. d. graph the function you build in part c. e. use the function you build in part c to find out how many fewer daylight hours february 10 will have than march 21. you may look at the calendar.