Which of the following situations describes a linear relationship?
a. during the hour before closing time, the number of customers at a coffee shop decreases by one-fifth every ten minutes.
b. the total cost of a taxi fare increases by $0.50 for each mile driven.
c. each month, the amount of an unpaid parking ticket doubles.
d. the annual amount of car insurance decreases by 5% for every year of having a good driving record.

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.