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aussy123

A = {(x, y): y >x2} help me graph

  • one year ago
  • one year ago

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  1. UnkleRhaukus
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    can you graph y=x^2

    • one year ago
  2. aussy123
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    No

    • one year ago
  3. UnkleRhaukus
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    ok lets make a table

    • one year ago
  4. aussy123
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    okay

    • one year ago
  5. UnkleRhaukus
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    lets have x for -3 to 3 |dw:1350917238347:dw|

    • one year ago
  6. UnkleRhaukus
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    if y=x^2 when x= -3 y= (-3)^2=

    • one year ago
  7. aussy123
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    9

    • one year ago
  8. UnkleRhaukus
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    good , so

    • one year ago
  9. UnkleRhaukus
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    |dw:1350917333290:dw|

    • one year ago
  10. aussy123
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    So you go down the table and make the equation y= x^2

    • one year ago
  11. UnkleRhaukus
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    can you fill in the rest of the table?

    • one year ago
  12. aussy123
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    okay

    • one year ago
  13. aussy123
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    |dw:1350917528971:dw|

    • one year ago
  14. UnkleRhaukus
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    |dw:1350917500305:dw|

    • one year ago
  15. UnkleRhaukus
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    good work, can you polt the rest of the points?

    • one year ago
  16. aussy123
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    yes

    • one year ago
  17. aussy123
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    |dw:1350917698467:dw|

    • one year ago
  18. UnkleRhaukus
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    very good, now if we connect these points, then the line will be y=x^2

    • one year ago
  19. UnkleRhaukus
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    but the question is y>x^2

    • one year ago
  20. aussy123
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    but where would we shade

    • one year ago
  21. UnkleRhaukus
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    well if y is greater then x^2, the y values in the the shaded region must be of greater values than the y=x^2 curve

    • one year ago
  22. UnkleRhaukus
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    so shade the region above the curve

    • one year ago
  23. aussy123
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    Okay thanks, I think I have it now!!

    • one year ago
  24. UnkleRhaukus
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    some times it is good to choose a point and check it , say the point (0,1) which is above the curve, to check y>x^2 1>0^2 1>0 which is true, so the point is in the region

    • one year ago
  25. aussy123
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    ok thanks for clarifying that, I will use this method on the other questions!!

    • one year ago
  26. UnkleRhaukus
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    the last thing to mention is that the line in not included in the region because we are doing y>x^2 if we were doing y≥x^2, the line would be included

    • one year ago
  27. aussy123
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    Because of the greater than or equal sign????

    • one year ago
  28. UnkleRhaukus
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    so maybe draw a dashed line like this |dw:1350918432085:dw|

    • one year ago
  29. aussy123
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    okay is it possible to shade in more than one place?

    • one year ago
  30. UnkleRhaukus
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    yes

    • one year ago
  31. UnkleRhaukus
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    but you would need a complicated equation

    • one year ago
  32. aussy123
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    okay then

    • one year ago
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