Data Handling - Pictographs

Introduction to Data Handling: Data handling involves collecting information and organizing it in a way that is easy to read. A pictograph is a visual way to represent this data using pictures or symbols instead of just numbers.

The Meaning of a Symbol: In a pictograph, a specific icon (like a smiley face, a star, or a ball) represents a set of items. For example, a visual of 1 star symbol might represent 5 actual stars in the sky.

The Key or Scale: This is the most important part of a pictograph, usually found at the bottom or top of the chart. It defines the value of one symbol. For instance, the key might say $1$ icon = $10$ students$. Visually, if you see 3 icons, you must calculate the total based on this key.

Interpreting Rows and Columns: Pictographs are arranged in a table format. The first column contains the names of categories (like days of the week or types of fruits), and the next column contains a row of symbols representing the quantity for that category.

Calculating Totals: To find the total number for a category, count the number of symbols and multiply it by the value specified in the key. If there are $4$ apples drawn and the key says $1$ apple = $2$ kg, then the total is $4 \times 2 = 8$ kg.

Handling Half Symbols: Sometimes, a partial or half symbol is used to represent half the value of a full symbol. Visually, if a full circle represents $10$ items, then a half-circle (a semi-circle) represents $\frac{10}{2} = 5$ items.

Comparison of Data: By looking at the length of the rows of symbols, you can visually compare which category has the most or least items. A longer row of pictures means a higher quantity, while a shorter row means a lower quantity.