1. The chart is used to visually present relationships between what variables? 2. A correlation analysis measures the strength of what variables? 3. A correlation analysis is concerned with the strength of the relationship between what variables? 4. If the plotted intersections between variables are tight, what does that indicate about the relationship between the variables? 5. If the plotted intersections between variables are in a flat, horizontal line, what does that mean about the relationship between variables? 6. The sample correlation coefficient ris used to measure what aspect of the linear relationship? 7. What range does the sample correlation between coefficient rranges indicate? 8. For a perfectly negative relationship (for every one unit increase in x, you have one unit of decrease in y), what is the sample correlation coefficient requal to