A traffic safety officer conducted an experiment to determine whether there is a correlation between people's ages and driving speeds. Six individuals were randomly sampled and the following data were collected. 
The value of Pearson r equals _________.
Definitions:
Allowance Account
An account used in accounting to estimate the portion of accounts receivable that may not be collectible.
Credit Balance
A Credit Balance occurs when the total credits in an account exceed the total debits, often indicating the amount owed to the customer or client in financial contexts.
Debit Balance
A condition where the sum of debits in an account exceeds the sum of credits, implying assets or expenses.
Allowance for Doubtful Accounts
An estimation of the amount of accounts receivable that may not be collected, which is used to adjust the gross accounts receivable to its net realizable value.
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