Reading Pictographs
Reading pictographs means interpreting a chart where each picture symbol represents a fixed quantity called the key. If one symbol equals 5 students and a category shows 3 symbols, then 3 x 5 = 15 students prefer that category. When a partial symbol appears, use the fraction of the symbol to estimate the partial quantity. This 7th grade data skill from Saxon Math Course 2 reinforces multiplication, fractions, and the general skill of extracting accurate information from visual data representations.
Key Concepts
Property A pictograph uses pictures to represent a quantity of data. A key shows the value that each picture represents.
Examples If one tire symbol = 100 tires, then $5\frac{1}{2}$ symbols represent $5 \times 100 + 50 = 550$ tires. If a book icon = 20 books, then 4 icons mean $4 \times 20 = 80$ books were read.
Explanation This graph uses pictures instead of bars. The key is your decoder ring—it tells you what each picture is worth. Just count the pictures and multiply to find the total amount. It makes large numbers easy to see!
Common Questions
How do you read a pictograph?
Find the key that says how many units each symbol represents. Then count the symbols in each row and multiply by the key value to get the total for that category.
What do you do with a half or partial symbol in a pictograph?
A half symbol represents half the key value. If the key is 10 and you see 3 and a half symbols, the total is 3.5 x 10 = 35.
What is the key in a pictograph?
The key explains what each symbol stands for. For example, if a star symbol = 5 votes, every star counts as 5 votes. The key is essential — you cannot interpret the pictograph without it.
What grade learns to read pictographs?
Pictographs are a data and statistics skill in 7th grade Saxon Math Course 2, used alongside circle graphs and other visual data representations.
How are pictographs different from bar graphs?
Pictographs use symbols to represent quantities; bar graphs use bars whose length represents quantity. Pictographs are often more engaging but less precise for large numbers.
How do you compare categories in a pictograph?
Count the symbols in each row and multiply by the key. Then compare the resulting totals. More symbols in a row always means more units in that category.