Graph Analysis
(Week 3-4)
Embedded Files
🧠 Explore
🎥 Watch and Learn
▶️ “Collecting and Organizing Data: Primary vs. Secondary”
▶️ “How to Read and Interpret Graphs” – Math Antics
▶️ “Understanding Bar Graphs, Pie Charts, and Histograms” – MashUp Math
📊 Understanding Data and Graphs
Primary Data → data you collect yourself (e.g., class surveys, experiments).
Secondary Data → data collected by others (e.g., research papers, websites).
We use graphs to visualize data and make it easier to compare, interpret, and analyze.
🧮 Examples
🧮 Examples
📊 The highest bar (Banana) shows the most popular fruit.
Example 3: Histogram
20 students’ heights (in cm):
140, 142, 145, 145, 147, 150, 150, 152, 155, 155, 157, 160, 162, 165, 168, 170, 172, 175, 178, 180
📊 The interval 150–159 has the highest frequency — most students’ heights fall in this range.
🧰 Interactive Tools to Explore
📊 Google Sheets Graph Maker: https://sheets.google.com
→ Make bar graphs, pie charts, or histograms easily.
📈 Desmos Graphing Calculator: https://www.desmos.com/calculator
→ Plot data and explore relationships.
🔢 GeoGebra Data Analyzer: https://www.geogebra.org/classic
→ Build histograms and frequency polygons interactively.
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