Data from 10 individuals in renal failure with high blood pressure are shown in the following table. The variable sodium represents salt consumption (in milligrams) and the variable BP represents systolic blood pressure (in mmHG).
|
Sodium (mg)
|
7.0
|
7.2
|
7.1
|
7.5
|
7.2
|
7.2
|
7.5
|
7.3
|
6.7
|
6.6
|
|
BP (mmHG)
|
156
|
169
|
164
|
177
|
192
|
160
|
197
|
191
|
170
|
150
|
a. Create a scatter plot of sodium intake and systolic blood pressure; describe the observed relationship (Note: use the correlation coefficient as a guide for the direction and strength of the relationship).
b. Determine the least squares regression line for the data.