# Teaching Math with PowerPoint Presented by: Nancy Jobe Ivy Tech Community College – Evansville 10-26-2012.

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Teaching Math with PowerPoint Presented by: Nancy Jobe Ivy Tech Community College – Evansville 10-26-2012

Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 11.2 - 2 Objectives 1.Graph linear equations by plotting ordered pairs. 2.Find intercepts. 3.Graph linear equations of the form Ax + By = 0. 4.Graph linear equations of the form y = k or x = k. 5.Use a linear equation to model data. Lay Out the Chapter Objectives

Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 13.5 - 6 (a) 38 0 Example 1 Evaluate. (b) (–9) 0 (c) –9 0 = –1(1) = –1(9) 0 = –1 = 1 (d) x 0 = 1 (e) 5x 0 = 5·1= 5 (f) (5x) 0 = 1 Try solving 2 a-e on p. 907 Make Simple Explanations Even Simplier

Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 11.3 - 7 8x – 2y = 4 and 5x + y = –3 First find the slope of each line by solving each equation for y. 8x – 2y = 4 –8x –2y = –8x + 4 y = 4x – 2 Slope is 4. 5x + y = –3 –5x y = –5x – 3 Slope is –5. Save Time Writing Problems Decide whether each pair of lines is parallel, perpendicular, or neither.

Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 13.5 - 8 Example 3 Simplify. Assume that all variables represent nonzero real numbers. Save Time Writing Problems

Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 11.2 - 11 Example 2 Find the intercepts for the graph of x + y = 2. Then draw the graph. To find the y-intercept, let x = 0; to find the x-intercept, let y = 0. x + 0 = 2 x = 2 x-intercept is (2,0) 0 + y = 2 y = 2 y-intercept is (0,2) Save Time Writing Problems and Drawing Graphs

Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 11.3 - 12 Are they parallel? Are they perpendicular? Can you plot their graphs? Neither parallel nor perpendicular The two equations: y = 4x – 2 & y = –5x – 3 Save Time Writing Problems and Drawing Graphs

Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 11.3 - 13 Save Time Writing Problems and Drawing Graphs Find each absolute value using the number line. Remember that the absolute value is the undirected distance from a number and zero. (a) |4| (b) | – 4| 4 spaces, so | – 4| = 4 4 spaces, so |4| = 4

Copyright © 2010 Pearson Education, Inc. All rights reserved. Sec 13.5 - 14 Want to Insert a Formula?  Go to the Insert Tab  Click on Equation at the far right to bring up the ribbon Some common formula are available by clicking the Formula down arrow.