5.39 ● The article “California State Parks Closure List Due Soon” (The Sacramento Bee, August 30, 2009) gave the following data on y 5 number of employees in fiscal year 2007–2008 and x 5 total size of parks (in acres)

for the 20 state park districts in California:

Number of Employees, y Total Park Size, x 95 39,334 95 324 102 17,315 69 8,244 67 620,231 77 43,501 81 8,625 116 31,572 51 14,276 36 21,094 96 103,289 71 130,023 Number of Employees, y Total Park Size, x 76 16,068 112 3,286 43 24,089 87 6,309 131 14,502 138 62,595 80 23,666 52 35,833

a. Construct a scatterplot of the data.

b. Find the equation of the least-squares line.

c. Do you think the least-squares line gives accurate predictions? Explain.

d. Delete the observation with the largest x value from the data set and recalculate the equation of the least-squares line. Does this observation greatly affect the equation of the line?