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BioHazard9064

  • one year ago

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  1. BioHazard9064
    • one year ago
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    Choose the equation that represents the graph below: A. y = -2x - 6 B. y = 2 over 3x + 6 C. y = -2 over 3x + 6 D. y = 2x + 6

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  2. Nnesha
    • one year ago
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    y=mx+b is a slope intercept form where m is slope and b is y-intercept if line is increasing then slope would be POSITIVE if line is decreasing then slope would be NEGATIVE y-intercept is a point where line cross y-axis

  3. Nnesha
    • one year ago
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    line is increasing OR decreasing ?

  4. BioHazard9064
    • one year ago
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    Decreasing

  5. Nnesha
    • one year ago
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    so slope would be negative or positive ?

  6. BioHazard9064
    • one year ago
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    negative

  7. Nnesha
    • one year ago
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    great now look at the graph at what point line intersect the y-axis ?

  8. BioHazard9064
    • one year ago
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    6

  9. Nnesha
    • one year ago
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    so y = mx + b b= y intercept substitute b for 6

  10. Nnesha
    • one year ago
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    |dw:1440081626618:dw| slope = rise over run

  11. BioHazard9064
    • one year ago
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    OK so

  12. BioHazard9064
    • one year ago
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    Is it D?

  13. Nnesha
    • one year ago
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    |dw:1440081752851:dw| do you see triangles you should draw a triangle where line intersect the corner

  14. Nnesha
    • one year ago
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    slope = rise over run |dw:1440081848549:dw|

  15. BioHazard9064
    • one year ago
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    ok i don't fully understand

  16. Nnesha
    • one year ago
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    okay so have y = mx+6 and u know that slope would be negative right ?

  17. Nnesha
    • one year ago
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    now pick two points to find slope

  18. Nnesha
    • one year ago
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    |dw:1440081994974:dw| can we use those two points look at the graph where i draw a dot x=what y = what ?

  19. Nnesha
    • one year ago
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    |dw:1440082179347:dw| slope formula \[\huge\rm \frac{ y_2 -y_1 }{ x_2-x_1 }\] now use these two poitns (0,6)(6,2) plug into the formula

  20. BioHazard9064
    • one year ago
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    so it would look like this? 0-2 _________ 6-6 am I right?

  21. Nnesha
    • one year ago
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    no (x,y)(0,6) first number represents x-coordinate 2nd one is y-coordinate so 0 is x or y ?

  22. BioHazard9064
    • one year ago
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    its the x

  23. BioHazard9064
    • one year ago
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    so it would look the same only the numbers are opposite

  24. Nnesha
    • one year ago
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    now y's should be at the top and x's at the bottom of the fraction so 0 shouldn't be there

  25. BioHazard9064
    • one year ago
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    so it would look like 6-6 ----- 0-6

  26. BioHazard9064
    • one year ago
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    no wait that 6 is supposed ti be a 2

  27. Nnesha
    • one year ago
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    |dw:1440083028882:dw| what is y_1and y_2 ? remember y's should be at the top

  28. BioHazard9064
    • one year ago
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    thy y's are 6 and 2

  29. Nnesha
    • one year ago
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    yes right so 2-6/6-0

  30. BioHazard9064
    • one year ago
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    2-6 is 4 and 6-0 is 6

  31. Nnesha
    • one year ago
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    no 2-6= ?

  32. BioHazard9064
    • one year ago
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    4 or -4

  33. Nnesha
    • one year ago
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    -4/6 negative cuz bigger number is negative now reduce the fraction -4/6= ? divide by 2

  34. BioHazard9064
    • one year ago
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    -2/3

  35. Nnesha
    • one year ago
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    yes right that's ur slope :)

  36. BioHazard9064
    • one year ago
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    ok so its between B and C

  37. BioHazard9064
    • one year ago
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    I Believe that B is the answer

  38. Nnesha
    • one year ago
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    y=mx+b what is ur slope ??

  39. Nnesha
    • one year ago
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    and what is y-intercept

  40. BioHazard9064
    • one year ago
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    -2/3 is the slope

  41. BioHazard9064
    • one year ago
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    and the y int is 6

  42. Nnesha
    • one year ago
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    yes so y = mx+ b replace m with -2/x and b with 6

  43. Nnesha
    • one year ago
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    i mean -2/3

  44. BioHazard9064
    • one year ago
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    y = -2/3x + 6

  45. BioHazard9064
    • one year ago
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    oh I forgot the - so it would be C

  46. Nnesha
    • one year ago
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    yep C

  47. BioHazard9064
    • one year ago
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    thanks

  48. Nnesha
    • one year ago
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    my pleasure

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