When a person begins a car trip, there are 12 gallons of gasoline in the car’s tank. During the trip, the car consumes 2 gallons of gasoline per hour. Let G be the volume (in gallons) of gasoline after the person has driven t hours.
a. Identify the explanatory and response variables.
b. Construct a table to describe the association between t and G for the following values of t: 0, 1, 2, 3, 4, and 5.
c. Use technology to construct a scatterplot for the ordered pairs listed in the table you constructed in part (b).
d. Describe the four characteristics of the association. Compute and interpret r as part of your analysis. If there is an association, draw an appropriate model in the scatterplot.