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The table shows the tips left by 5-guests at a restaurant

/in /by

The table shows the tips left by 5-guests at a restaurant and the
price of the food (check) that was served. The amounts are in US dollars.
Check TIP
239.56 50
179.85 20
110.56 30
80.96 15
156.97 35

1. Use your calculator or a computer program to find an equation of the regression line.

2. Find the predicted value (value according to the line) if the check is of $120.

 
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