Name:    Scatter Plots

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1.

The ideal weight (in stones) of people of varying heights is given in the table below. Draw a scatter plot for the data.

 Height (feet/inches) 5 ft 0” 5 ft 1” 5 ft 2” 5 ft 3” 5 ft 4” 5 ft 5” Weight (stones) 9.1 9.5 9.8 10 10.4 10.8

 HeightGraph I HeightGraph III HeightGraph II HeightGraph IV
 a. Graph I c. Graph III b. Graph II d. Graph IV

2.

The table below gives a record of variations of the values of y with the values of x. Use the ordered pairs shown below to write a prediction equation. Use the prediction equation to predict the missing value.

 x 0.4 1.2 2.0 3.1 4.5 5.7 7.1 8.4 9.3 9.8 y 7.8 7.1 6.8 6.0 5.2 4.3 3.4 2.3 1.1 ?
 a. y = ;  1.2 c. y = ; 2.0 b. y = ; 1.2 d. y = ; 2.5

3.

The table below shows the median selling price of houses in the early 1990s. Use the ordered pairs shown below to write a prediction equation. Use the prediction equation to predict the missing value.

 Year 1990 1991 1992 1993 1994 1995 1996 1997 Price (\$ thousands) 130 135 122 145 151 139 161 ?
 a. y = ; 161.01 c. y = ; 36.19 b. y = d. y = ; 210

4.

The data below represents the relationship between the number of incidences of UFO sightings in late 1930s and early 1940s. Use the ordered pairs shown below to write a prediction equation. Use the prediction equation to predict the missing value.

 Year of Incidence 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 Number of Incidences(percent) 0.9 0.8 0.8 1.3 1.4 1.2 1.7 1.8 1.6 1.5 ?
 a. y = ; 1.808 c. y = ; 1.07 b. y = ; 0.97 d. y = ; 1.40