The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker. They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars. These data are presented in the table that follows.

Using the table, answer the following questions:

1. Referring to the aboveTable, the least squares estimate of the slope is __________.

2. Referring to Table , the least squares estimate of the Y-intercept is __________.

3. Referring to Table, the prediction for the amount of sales (in $1,000s) for a person who brings 25 new clients into the firm is ________.

4. Referring to Table, the total sum of squares (SST) is __________.

Broker Clients Sales 27 52 37 64. 2 42 4 15 15 25 36 28 30 17 22 29 34. 58 59 10 48 31 38 12