Histogram – Histogram is a chart of poles. Plotting histogram is a graphical method for summarizing the distribution of a given attribute, the resulting distribution is most commonly known as bar chart.
Scatter Plot- Scatter plot is one of the most effective graphical methods for determining if there appears to be a relationship or pattern between two numeric attributes.
Positive Correlation – If the pattern of the points slopes from Lower left to Upper right.
Negative Correlation – If the pattern of the points slopes from upper left to lower right.