Sodium and SBP. Data from 10 individuals in renal failure with high blood pressure are shown in the following table. The variable sodium represents salt consumption (mg) and the variable bp represents systolic blood pressure (mmHg).

1. Demonstrate the relationship between sodium intake and systolic blood pressure with a scatterplot. Interpret.
2. Can the observed relationship be easily explained by "chance"? Justify your response.

3.Determine the least squares regression line for the data. What does the slope coefficient tell you about the relationship between sodium and bp?

4. What is the predicted bp for a person from this population that consumes 7.0 mg of sodium per day?

5. What is the value of the residual associated with the first observation? The observed value for the first observation is (7.0, 156).

6. Draw the regression line on the scatterplot, then show the residual associated with the first data point on the graph.