A-9 Scatter Plots, Lines of Best Fit, and Correlations.pdf

A-9 Scatter Plots, Lines of Best Fit, and Correlations Name:_________________________
Pre-Algebra
Period:______________
1) The following table shows the height of basketball players and the number of rebounds each player
averaged over the course of a season.
Height of Player (in) 66 72 73 74 69 67 70 68 71
Average Rebounds per game 2 7 8 11 5 6 5 4 6
Make a scatter plot of the data
Draw a line of best fit
Is the relationship positive, negative, or no relationship
Shaquille O'Neal is 85 inches tall, how many rebounds would he average per game?
Mugsy Bogues was 64 inches tall, how many rebounds would he average per game?
Manute Bol averaged 15 rebounds a game, how tall is he?
What type of relationship, positive, negative, or no relationship is shown by each scatter plot?
2. 3. 4.

Determine whether a scatter plot of the data for the following might show a positive, negative, or no
relationship. Explain your answer.
5) size of household and amount of water bill
6) number of songs on a CD and cost of a CD
7) outside temperature and amount of heating bill
8) speed and distance traveled
9) size of a car's engine and miles per gallon of fuel used
10) shoe size and grade point average
11) The table below shows the number of video cassette movies sold (in millions) over the course of the last
10 years.
Year 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
Number
of Video
cassettes
sold per
year
(millions)
500 480 475 455 400 320 270 200 180 140
Make a scatter plot of the data
Draw a line of best fit
Describe relationship between time and number of video cassettes sold
During which year will video cassette sales reach only 100 million?
During which year will video cassette sales reach 0 sold?