Cobern bought some stock in the year 2007. im 2012, the stock was worth $5,000 and in 2016 it was worth $1,000. 1. on a grid, plot ordered pairs to represent this information. (treat 2007 as year 0)
2. determine the equation of this scenario.
3. What does the rate of change represent?
4. What did Cobern pay for the stock in the year 2007?
5. In what year will the stock be worth nothing?

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.