Definition: Pictographs

A pictograph is a method of representing data using images or symbols. It represents the frequency of the data using images. Each image represents the frequency of the data.

Explanation:

The pictograph shows the profits earned by a company which shows the profits earned by a company over four years. The years listed are 2020, 2021, 2022, and 2023.

Definition: Frequent Tables

A frequency table is simply a “t-chart” or two-column table that outlines the various possible outcomes and the associated frequencies observed in a sample.

Explanation:

The frequent table shows the students in each income class. The first row shows the income class (20-30 rupees, 30-40 rupees, etc.). The second row shows tally marks for each income class. The third row shows the frequency.

Definition: Histograms

A histogram is a graph that shows the frequency of numerical data using rectangles. The height of a rectangle (the vertical axis) represents the distribution frequency of a variable (the amount, or how often that variable appears).

Explanation:

The diagram you sent is a histogram titled "Number of lamps". The x-axis of the diagram shows the lifetime of the lamps in hours. The y-axis shows the number of lamps.