Circle graph
Solve circle graph in Grade 9 math — The whole circle represents the entire set of data. Part of Functions and Graphing for Grade 9.
Key Concepts
Property A circle graph uses sections of a circle to compare parts of the circle to the whole circle. The whole circle represents the entire set of data.
Examples Total sales: 20 million dollars. 4th Quarter sales (43%): $0.43 \times 20,000,000 = 8,600,000$ dollars. Total sales: 20 million dollars. 1st Quarter sales (12%): $0.12 \times 20,000,000 = 2,400,000$ dollars. If 1st Quarter (12%) sales were 3 million dollars, total sales would be $3,000,000 \div 0.12 = 25,000,000$ dollars.
Explanation Imagine a pizza sliced up to show survey results! The whole pizza is 100% of your data, and each slice shows what percentage each category gets. A bigger slice means a bigger share! It's perfect for showing parts of a whole, like a budget or sales per quarter.
Common Questions
What is 'Circle graph' in Grade 9 math?
The whole circle represents the entire set of data. The whole circle represents the entire set of data.
How do you solve problems involving 'Circle graph'?
The whole circle represents the entire set of data. Explanation Imagine a pizza sliced up to show survey results!.
Why is 'Circle graph' an important Grade 9 math skill?
A common mistake is to calculate $400 \times 35$ instead of $400 \times 0.35$.. Always divide the percentage by 100 first.