Question

Use the data you collected for the regular assessment and the graphing tool above to:

Create another scatter plot using the same data.
Create the line of best fit using the graphing tool and calculate the equation of that line. Submit the equation of the line along with the coordinates of two points that lie on the line.

Answer 1

In a paragraph of at least three sentences, compare and contrast the line you drew manually in the regular lesson with the line you just found using the graphing technology. As you write your paragraph, consider how the resulting equations are alike and how they are different.
Answer these questions and compare them to the answers you found with your estimated line of best fit in the regular lesson:
According to your findings how tall would a woman be whose arm span is 66 inches?
According to your findings what can you expect the arm span of a 74-inch tall man to be?

Answer 2

Year Competitors* Year Competitors* Year Competitors*
1976 2.1 1987 22.5 1997 31.4
1977 4.8 1988 23.5 1998 32.4
1978 9.8 1989 25 1999 32.5
1979 11.5 1990 25.8 2000 30
1980 14 1991 26.9 2001 24
1981 14.5 1992 28.6 2002 32.5
1982 14.3 1993 28.1 2003 35.3
1983 15.2 1994 31.1 2004 37.3
1984 14.6 1995 29 2005 37.6
1985 16.7 1996 29 2006 38.4
1986 20.5