1989 480 24
1990 497 16
1991 512 24
1992 513 21
1993 526 15
1994 557 33
1995 585 34
1996 614 34
1997 645 39
a. Makea scatterplot of the data.
b. Use linearregressionto find the line of best fit.
c. Supposein the year 2000,powerboatregistrationsincreaseto 700,000.Predicthow manymanateeswill
be killed.Assumea linearmodeland find the line of best fit.
- A passageinGulliver’s Travelsstatesthat the measurementof “Twice aroundthe wrist is oncearound
the neck.”The tablebelowcontainsthe wrist and neckmeasurementsof 10 people.
Wrist (cm) Neck(cm)
17.9 39.5
16 32.5
16.5 34.7
15.9 32
17 33.3
17.3 32.6
16.8 33
17.3 31.6
17.7 35
16.9 34a. Makea scatterplot of the data.
b. Find the line of best fit and commenton the accuracyof the quotefrom the book.
c. Predictthe distancearoundthe neckof Gulliverif the distancearoundhis wrist is foundto be cm.
- The followingtablegiveswomen’s averagepercentageof men’s salariesfor the samejobs for each5-
year periodfrom 1960–2005.
Year Percentage
1960 42
1965 36
1970 30
1975 37
1980 41
1985 42
1990 48