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Steph_Rawr352

  • 2 years ago

Which system of inequalities are graphed in this picture? (attached below)

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  1. Steph_Rawr352
    • 2 years ago
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  2. nubeer
    • 2 years ago
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    ok can u find the equations of line?

  3. Steph_Rawr352
    • 2 years ago
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    what do you mean?

  4. nubeer
    • 2 years ago
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    you know equation of line.. coordinate geometry? finding slope?

  5. Steph_Rawr352
    • 2 years ago
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    no /: I don't really understand this/:

  6. nubeer
    • 2 years ago
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    hmmm ok this would be hard then.. have u even find a slope or gradient? or studied of it?

  7. Steph_Rawr352
    • 2 years ago
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    no/: i'm sorry):

  8. nubeer
    • 2 years ago
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    lol no worries.. well then u need to memorize few formula's and stay with me on this one.. \[slope = \frac{ y2-y1 }{ x2-x1 }\] the x's and y's are coordinates or points on graph.

  9. nubeer
    • 2 years ago
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    |dw:1355596018107:dw|

  10. nubeer
    • 2 years ago
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    pick one point and tell me it's coordinates/?

  11. Steph_Rawr352
    • 2 years ago
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    a point on the line or any point?

  12. nubeer
    • 2 years ago
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    point on line.

  13. Steph_Rawr352
    • 2 years ago
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    (2,-4)

  14. nubeer
    • 2 years ago
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    good.. now pick another one.

  15. Steph_Rawr352
    • 2 years ago
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    (-1,5)

  16. nubeer
    • 2 years ago
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    good these points are x2, y2 and the before one and x1,y1 now put these points in the slope formula

  17. Steph_Rawr352
    • 2 years ago
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    would it be 9/-3 ?

  18. nubeer
    • 2 years ago
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    yes. which is equal to -3 so m=-3 m is slope ok?

  19. Steph_Rawr352
    • 2 years ago
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    oh ok

  20. nubeer
    • 2 years ago
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    ok good.. now the other formula.. equation of line y = mx+c

  21. nubeer
    • 2 years ago
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    y = -3x +c right?

  22. Steph_Rawr352
    • 2 years ago
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    yeah

  23. nubeer
    • 2 years ago
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    ok now choose any point from the above two and put the value of x and y in this equation to find c

  24. Steph_Rawr352
    • 2 years ago
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    I got 5 = 3 + c ?

  25. nubeer
    • 2 years ago
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    yes find c..

  26. nubeer
    • 2 years ago
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    you doing it right dont worry.

  27. Steph_Rawr352
    • 2 years ago
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    c = 2 ? and ohk thanks

  28. nubeer
    • 2 years ago
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    yes c = 2 so your equation is y = -3x +2 y +3x = 2 as its told that its inequatlity so put an inequatlity sign .. and the line on graph is dotted so u will just put < or> sign not equal with them.. now tell me which region is shaded from the line.. above or below?

  29. Steph_Rawr352
    • 2 years ago
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    would it be > ? and above?

  30. nubeer
    • 2 years ago
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    yes.

  31. Steph_Rawr352
    • 2 years ago
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    ohhhh ohk i see what you're doing! so now to find the other inequality.. do i pick two point from the other line? btw thank you for helping me (:

  32. nubeer
    • 2 years ago
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    yes same way for other line .. and no worries.. anytime :)

  33. Steph_Rawr352
    • 2 years ago
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    thank you! I understand it much more (: I'll do the other line Thank you!

  34. nubeer
    • 2 years ago
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    :) you are most welcome.

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