The scatter plot below shows the relationship between the day of a particular month a stock was valued …

1. The scatter plot below shows the relationship between the day of a particular month a stock was valued and the price of the stock in dollars.  The horizontal axis represents the day of the month.  Use this graph to answer the questions below.
Graph: (x) 1 2 3 4 5 6 7 8
(Y) 58 54 48 44 44 32 30 24
(A) How would you describe the relationship between the day of the month this stock was valued and the price of the stock?
(B)  Approximately what was the stock price on day 7?
(C)  Would the slope of the “line of best fit” be positive or negative?

7. Four cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of Jacks drawn in a set of 4 cards.
(A)  If this experiment is completed without replacement, explain why x is not a binomial random variable.
(B)  If this experiment is completed with replacement, explain why x is a binomial random variable.

8. You are given the following data.
0 92
1 89
2 81
3 72
4 65
5 49
–          Find the correlation coefficient for the data.
–         Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.

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