16. USE TOOLS Several groups volunteered to clean up litter along a mile of the highway near their town. The table shows how many people were in each group
and how long it took each group to finish the job.
Workers 9 16 18
15
8
11 9 17 9 15 11 12
Minutes 80 40 35 90 60 60 70
70
70 50 80
30
a. Graph the data on a scatter plot.
b. Draw a line of fit to show the trend of the data.
c. Choose two points on the line of fit. Then find the equation of the line in slope-
intercept form
d. Another group wants to get done in 45 minutes. About how many workers
should they have? Explain your reasoning.
e. Find the y-intercept of the line of fit. Does the y-intercept make sense in the
context of the situation? Justify your argument.