Select all the relationships that demonstrate a positive association between variables.
For one of the relationships you do NOT select, explain
why you did not select it.
(Select all that apply.)
a. Outside temperature and cost to heat a home
b. Length of time you have walked and distance you have
traveled
c. Pounds of cherries you buy and amount of money you
spend on cherries
✓d. Speed of a train and the amount of time it takes for the
train to get to its destination
e. Number of people in a grocery check-out line and how
long you have to wait to check out