Welcome to Interactive Chalkboard Algebra 1 Interactive Chalkboard Copyright © by The McGraw-Hill Companies, Inc. Send all inquiries to: GLENCOE DIVISION Glencoe/McGraw-Hill 8787 Orion Place Columbus, Ohio 43240

Splash Screen

Contents Lesson 5-1Slope Lesson 5-2Slope and Direct Variation Lesson 5-3Slope-Intercept Form Lesson 5-4Writing Equations in Slope-Intercept Form Lesson 5-5Writing Equations in Point-Slope Form Lesson 5-6Geometry: Parallel and Perpendicular Lines Lesson 5-7Statistics: Scatter Plots and Lines of Fit

Lesson 7 Contents Example 1Analyze Scatter Plots Example 2Find a Line of Fit Example 3Linear Interpolation

Example 7-1a Determine whether the graph shows a positive correlation, a negative correlation, no correlation. If there is a positive or negative correlation, describe it. The graph shows average personal income for U.S. citizens. Answer:The graph shows a positive correlation. With each year, the average personal income rose.

Example 7-1b Determine whether the graph shows a positive correlation, a negative correlation, no correlation. If there is a positive or negative correlation, describe it. The graph shows the average students per computer in U.S. public schools. Answer: The graph shows a negative correlation. With each year, more computers are in the schools, making the students per computer rate smaller.

Example 7-1c Determine whether each graph shows a positive correlation, a negative correlation, no correlation. If there is a positive or negative correlation, describe it. a.The graph shows the number of mail-order prescriptions. Answer:Positive correlation; with each year, the number of mail-order prescriptions has increased.

Example 7-1d Determine whether each graph shows a positive correlation, a negative correlation, no correlation. If there is a positive or negative correlation, describe it. Answer:no correlation b.The graph shows the percentage of voter participation in Presidential Elections.

End of Lesson 7

Transparency 7 Click the mouse button or press the Space Bar to display the answers.

Transparency 7a

End of Custom Show End of Custom Shows WARNING! Do Not Remove This slide is intentionally blank and is set to auto-advance to end custom shows and return to the main presentation.

End of Slide Show