7.1. Line Graphs http://www.ck12.org
skated. Therefore, money is on they-axis, and time is on thex-axis as shown below:
A participant who skates for the entire 6 hours can make $28.00 for the "Skate for Scoliosis" event. The points
are joined, because the fractions and decimals between 2 consecutive points are meaningful for this problem. A
participant could skate for 30 minutes, and the arena would pay that skater $1.50 for the time skating. The data is
continuous.
Practice
- What term is used to describe a data set in which all points between 2 consecutive points are meaningful?
a. discrete data
b. continuous data
c. random data
d. fractional data - What type of variable is represented by the number of pets owned by families?
a. qualitative
b. quantitative
c. independent
d. continuous - What type of data, when plotted on a graph, does not have the points joined?
a. discrete data
b. continuous data
c. random data
d. independent data - Select the best descriptions for the following variables and indicate your selections by marking an ’x’ in the
appropriate boxes.
TABLE7.5:
Variable Quantitative Qualitative Discrete Continuous
Men’s favorite TV
shows
Salaries of baseball
players
Number of children
in a family
Favorite color of
cars
Number of hours
worked weekly