The number of decks of popular trading cards is a function f of the number of days d since the shipment arrived. Calculate the average rate of change from day to day 20.
A. -0.012 decks per day
B. -83.1 decks per day
C. 83.1 decks per day
D. 0.012 decks per day

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250