The qualitative data can be presented by :

For Quantitative data: Histogram —variables on X-axis is called "abscissa” and frequency marked on Y-axis is called  "ordinate". Frequency polygon — indicated when sets of data to be elicited on same diagram. Bell/normal curve is the most common type of frequency polygon. It resembles a smooth curve. Line diagram. Scatter/Dot/correlation diagram — shows the nature of correlation between 2 variables. If the dots cluster around a straight line, it shows a linear relationship.