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anonymous

  • one year ago

The graph below shows the distances, in miles, that a dragonfly can travel in a certain number of hours: A graph titled Motion of a Dragonfly shows Time in hours on the x axis and Distance in miles on the y axis. The scale on the x axis shows number from 0 to 10 at increments of 2 and on the y axis the numbers are shown from 0 to 250 at increments of 50. A straight line joins the ordered pairs 0, 0 and 2, 50 and 4, 100 and 6, 150 Based on the graph, what is the dependent variable, the equation relating the two variables, and how far will the dragonfly travel in 24 hours if it continues t

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  1. anonymous
    • one year ago
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    The dependent variable is distance, the equation is y = 25x, and the dragonfly will travel 600 miles. The dependent variable is distance, the equation is x = 25y, and the dragonfly will travel 720 miles. The dependent variable is time, the equation is y = 25x, and the dragonfly will travel 600 miles. The dependent variable is time, the equation is x = 25y, and the dragonfly will travel 720 miles.

  2. anonymous
    • one year ago
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    @Deeezzzz

  3. anonymous
    • one year ago
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    @d3v13

  4. anonymous
    • one year ago
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    @mathstudent55

  5. anonymous
    • one year ago
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    someone plz help

  6. UnkleRhaukus
    • one year ago
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    |dw:1437722943757:dw|

  7. anonymous
    • one year ago
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    yes

  8. UnkleRhaukus
    • one year ago
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    |dw:1437723016130:dw|

  9. anonymous
    • one year ago
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    correct

  10. UnkleRhaukus
    • one year ago
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    |dw:1437723141054:dw|

  11. anonymous
    • one year ago
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    yes it is

  12. UnkleRhaukus
    • one year ago
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    so what is the dependent variable ?

  13. anonymous
    • one year ago
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    the y axis

  14. UnkleRhaukus
    • one year ago
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    which variable does this correspond to (for the dragonfly)

  15. anonymous
    • one year ago
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    what do u mean

  16. anonymous
    • one year ago
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    ?????

  17. UnkleRhaukus
    • one year ago
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    which variable (distance or time)

  18. anonymous
    • one year ago
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    distance

  19. UnkleRhaukus
    • one year ago
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    yes the 'distance' the dragonfly can fly is the dependent variable, [this distance depends on how how much time the dragon fly has]

  20. anonymous
    • one year ago
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    so is the answer either a or c

  21. anonymous
    • one year ago
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    nvm its A, right

  22. UnkleRhaukus
    • one year ago
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    the slope intercept form of a straight line through the origin, is y = mx + b when the slope of the line is m and the y-intercept is b.

  23. anonymous
    • one year ago
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    y=25x right??

  24. UnkleRhaukus
    • one year ago
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    we see that the line passes through the origin, so we know that b=0. but what is the slope m?

  25. anonymous
    • one year ago
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    is it a

  26. UnkleRhaukus
    • one year ago
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    if we find the slope between (0,0) and (2,50) m = (50-0)/(2-0) = 50/2 = 25 so yes the slope m is 25

  27. anonymous
    • one year ago
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    yaaaay thx

  28. anonymous
    • one year ago
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    is it a

  29. anonymous
    • one year ago
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    ????

  30. anonymous
    • one year ago
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    y=25x

  31. UnkleRhaukus
    • one year ago
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    you have y(x) = 25x or equivalently distance(time[hours])[miles] = 25[miles/hours] * t[hours]

  32. anonymous
    • one year ago
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    is the correct answer a

  33. UnkleRhaukus
    • one year ago
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    what do you get when time[hours] = 24[hours] d(24[hr])[mi] = 25[mi/hr] * 24[hr]

  34. anonymous
    • one year ago
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    ??????????

  35. anonymous
    • one year ago
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    just tell me if it is A

  36. UnkleRhaukus
    • one year ago
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    multiply 25 [miles/hour], by 24[hours]

  37. anonymous
    • one year ago
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    600

  38. anonymous
    • one year ago
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    so a is correct

  39. UnkleRhaukus
    • one year ago
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    [units?]

  40. anonymous
    • one year ago
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    i did 25 x 24

  41. UsukiDoll
    • one year ago
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    units matter too ....

  42. UsukiDoll
    • one year ago
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    25 m/h x 24 h

  43. anonymous
    • one year ago
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    so what do i do

  44. UsukiDoll
    • one year ago
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    a unit can be canceled out

  45. UsukiDoll
    • one year ago
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    |dw:1437724317100:dw|

  46. anonymous
    • one year ago
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    so A is not right????

  47. UnkleRhaukus
    • one year ago
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    \[25 [\text{mi}/\text{hr}] \times 24[\text{hr}] =(25\times24)\frac{[\text{mi}][\text{hr}]}{[\text{hr}]} \\ =(25\times24)\frac{[\text{mi}]\cancel{[\text{hr}]}}{\cancel{[\text{hr}]}} \]

  48. UsukiDoll
    • one year ago
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    Thank you @UnkleRhaukus

  49. anonymous
    • one year ago
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    600m

  50. UsukiDoll
    • one year ago
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    there we go.

  51. anonymous
    • one year ago
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    ohhhh

  52. anonymous
    • one year ago
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    so a is right

  53. UsukiDoll
    • one year ago
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    bunch of physics problems have numbers and units. so we need to keep the units while we're computing... otherwise the grader will be like 600 what ? 600 miles

  54. UnkleRhaukus
    • one year ago
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    meters is [m], miles is [mi] .

  55. anonymous
    • one year ago
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    k thx

  56. UnkleRhaukus
    • one year ago
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    |dw:1437724740526:dw|

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