1.
Exploratory Data Analysis
1.3. EDA Techniques 1.3.3. Graphical Techniques: Alphabetic 1.3.3.26. Scatter Plot


Scatter Plot Showing an Exact Linear Relationship  
Discussion  Note in the plot above how a straight line comfortably fits through the data; hence there is a linear relationship. The scatter about the line is zerothere is perfect predictability between X and Y), so there is an exact linear relationship. The slope of the line is positive (small values of X correspond to small values of Y; large values of X correspond to large values of Y), so there is a positive corelation (that is, a positive correlation) between X and Y. 