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Algebra 1 A CHAPTER 9 POWERPOINT PRESENTATION

Algebra 1 A CHAPTER 9 POWERPOINT PRESENTATION. LINEAR EQUATIONS AND INEQUALITIES IN THE COORDINATE PLANE. LEARNING TARGETS. AFTER YOU COMPLETE THIS CHAPTER, YOU WILL BE ABLE TO: IDENTIFY PARTS OF A GRAPH LOCATE AND PLOT POINTS ON THE GRAPH SOLVE EQUATIONS TO FIND AN ORDERER PAIR

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Algebra 1 A CHAPTER 9 POWERPOINT PRESENTATION

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  1. Algebra 1A CHAPTER 9 POWERPOINT PRESENTATION LINEAR EQUATIONS AND INEQUALITIES IN THE COORDINATE PLANE

  2. LEARNING TARGETS • AFTER YOU COMPLETE THIS CHAPTER, YOU WILL BE ABLE TO: • IDENTIFY PARTS OF A GRAPH • LOCATE AND PLOT POINTS ON THE GRAPH • SOLVE EQUATIONS TO FIND AN ORDERER PAIR • DETERMINE THE SLOPE OF A GRAPH • SOLVE LINEAR EQUATIONS AND INEQUALITIES AND GRAPH THEM • INTERPRET GRAPHS

  3. THE COORDINATE SYSTEM • x axis – runs horizontally • y axis – runs vertically • Origin – where x and y axis cross (0,0) • Quadrant – four sections of the graph, numbered with Roman Numerals, runs counter-clockwise • Ordered Pair – one x point and one y point (2,3) – can be plotted on the graph

  4. SOME VISUAL EXAMPLES • THE GRID SYSTEM

  5. Locating Points

  6. GRAPHING • FIRST YOU MUST COMPLETE AN (X/Y TABLE) WITH AT LEAST THREE VALUES. • THEN YOU FIND THE COORDINATES AND PLACE THEM ON THE GRAPH. • YOU CONNECT THE COORDINATES TO FORM A STRAIGHT LINE. THAT IS A LINEAR EQUATION. • THE NEXT SLIDE CONTAINS AN EXAMPLE OF AN (XY TABLE AND THE GRAPH).

  7. (x/y table and graph)

  8. Intercepts • The x-intercept is where the line of the graph crosses the x- axis. • The y-intercept is where the line of the graph crosses the y-axis.

  9. SLOPE • SLOPE IS THE MEASURE OF THE STEEPNESS OF THE LINE ON THE GRAPH. THERE ARE FOUR KINDS: • POSITIVE • NEGATIVE • SLOPE OF ZERO • UNDEFINED SLOPE

  10. POSITIVE SLOPE

  11. NEGATIVE SLOPE

  12. SLOPE OF ZERO

  13. UNDEFINDED SLOPE

  14. LINEAR EQUATION • THE EQUATION FOR A GRAPH WITH A STRAIGHT LINE: y = mx + b • m = the slope • b = the y-intercept

  15. VOCABULARY • DEPENDENT VARIABLE – THE VALUE OF THE Y VARIABLE THAT DEPENDS ON THE VALUE GIVEN FOR X. • INDEPENDENT VARIABLE – THE VALUE OF X WHICH DETERMINES THE VALUE OF Y • FUNCTION – A RULE THAT STATES THERE IS ONLY ONE X VALUE FOR EACH Y VALUE • VERTICAL LINE TEST – A VERTICAL LINE INTERSECTS THE GRAPH

  16. VERTICAL LINE TEST

  17. MORE VERTICAL LINE TEST

  18. DOMAIN AND RANGE OF A FUNCTION • FUNCTION – ONE AND ONLY ONE X VALUE • RELATION – MORE THAN ONE X VALUE FOR EACH Y VALUE • DOMAIN – ALL THE X VALUE • RANGE – ALL THE Y VALUES

  19. INEQUALITIES • USE THE FOLLOWING SYMBOLS:

  20. GRAPHS OF INEQUALITES

  21. OTHER GRAPHS OF INEQUALITIES

  22. GRAPHS OF OTHER FUNCTIONS

  23. SLOPE FORMULA

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