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statistic

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age days in hospital
40 11
36 9
30 10
27 5
24 12

a. draw a scatter diagram (completed)

b. does there appear to be a correlation between age and number days in the hospital? no Find the r value for this problem to verify your answer? R=.16
c what is the regression equation for the data? y=.07+7.35

The book has 0.065x+7.35 how did they get that answer.

d.use the equation to predict the length of stay for a patient who is 32 years old. do you beleive this predicaiton is reliable? why or why not?
I am not sure how to solve d.

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