David Ding advertises on a local radio station. For the past sixweeks, the manager has kept records of the number of minutes ofadvertising that were purchased, and the sales for that week. Week1, 2 minutes of advertising with $1.400 in sales. Week 2, 1 minute,$920 in sales. Week 3, 3 minutes advertising, $1,100 in sales. Week4, 5 minutes of advertising with $2,265 in sales. Week 5, 5 minutesof advertising, $2,890 in sales. Week 6, 4 minutes in advertising,$2,200 in sales.
1). What is the y-intercept, the slope, and the correlationcoefficient from the above data.
2). Estimate sales if 7minutes of advertising were purchased.
3). Estimate sales if 8 minutes were purchased.
4). How many minutes of advertising should David buy to attainsales of $3,000?