Trevor recorded the amount of material collected for recycling at his school for 5 weeks. Trevor calculated a line of best fit for the data to model the amount collected, y,
as a function of time, x. He found the correlation coefficient to be between 0.7 and -1.
Which statement BEST describes the correlation among the data?
A. There is a weak correlation in which the amount collected increased as time increased.
B. There is a weak correlation in which the amount collected decreased as time increased.
C. There is a strong correlation in which the amount collected increased as time increased.
D. There is a strong correlation in which the amount collected decreased as time increased.

D or C

Step-by-step explanation:

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

step-by-step explanation: