1. Graphs visually depict data, making it easier to see patterns and trends. Section 4: Representing Data K What I Know W What I Want to Find Out L What I Learned

2. 2(H)Organize, analyze, evaluate, make inferences, and predict trends from data. 2(G) Express and manipulate chemical quantities using scientific conventions and mathematical procedures, including dimensional analysis, scientific notation, and significant figures. Representing Data Copyright © McGraw-Hill Education

3. Essential Questions Why are graphs created? How can graphs be interpreted? Representing Data Copyright © McGraw-Hill Education

4. Review independent variable Representing Data Copyright © McGraw-Hill Education Vocabulary New graph

5. Graphing A graph is a visual display of data that makes trends easier to see than in a table. A circle graph, or pie chart, has wedges that visually represent percentages of a fixed whole. Representing Data Copyright © McGraw-Hill Education

6. Graphing Bar graphs are often used to show how a quantity varies across categories. Representing Data Copyright © McGraw-Hill Education

7. Graphing On line graphs, independent variables are plotted on the x-axis and dependent variables are plotted on the y-axis. If a line through the points is straight, the relationship is linear and can be analyzed further by examining the slope. Representing Data Copyright © McGraw-Hill Education

8. Interpreting Graphs Interpolation is reading and estimating values falling between points on the graph. Extrapolation is estimating values outside the points by extending the line. This graph shows important ozone measurements and helps the viewer visualize a trend from two different time periods. Representing Data Copyright © McGraw-Hill Education

9. Representing Data Copyright © McGraw-Hill Education Review Essential Questions Why are graphs created? How can graphs be interpreted? Vocabulary graph