Question

In 2005, a large metropolitan area of the United States allowed some drivers involved in minor accidents to take Driver Education Courses in lieu of receiving traffic citations.   A table recording the number of drivers, sorted by the age of the driver, who accepted this offer, is as follows:

Age	Number of Driver Education Courses per 100,000
15-24	28
25-39	15
40-69	10
70-79	15
80+	25

1. For each age group, pick the midpoint of the interval for the x value. (For the 80+ group, use 85.)

2. Using ages as the independent variable and Number of Driver Education Courses per 100,000 as the dependent variable, make a scatter plot of the data.

3. Calculate the least squares (best-fit) line. Put the equation in the form of: y = mx + b

HINT: to estimate the line, choose any two points in the chart, find the slope

(m = Rise / Run) and then the y intercept (by making y = 0 and solving for b)

Answer 1