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Agl202

  • one year ago

Quick Question... MEDAL!!! What is the equation in point-slope form of the line passing through (4, 0) and (2, 6)? y = 4x − 2 y = 2x − 4 y = −3(x − 4) y = 3(x + 4)

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  1. Agl202
    • one year ago
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    What is the equation of a horizontal line passing through the point (−3, 8)? x = −3 y = 8 x = 5 y = −11

  2. Agl202
    • one year ago
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    For the second one I think it's A. Right?

  3. Agl202
    • one year ago
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    The first one is D.

  4. MrNood
    • one year ago
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    no - not 'right' it's a horizontal line what is true about the y value for all points on a horizontal line?

  5. MrNood
    • one year ago
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    |dw:1442266108704:dw| for the first one - the answer is not D

  6. Agl202
    • one year ago
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    Hmmm

  7. MrNood
    • one year ago
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    for the fist one: you have 2 points (as I sketched above) the slope is calaculated by subtracting the the y values , subtracting the x values and dividing what is the slope of the line in the first one? in the second one: it's a horizontal line what is true about the y value for all points on a horizontal line?

  8. Agl202
    • one year ago
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    For the second one: all values of x give the same value of y .

  9. Agl202
    • one year ago
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    y=8 right?

  10. MrNood
    • one year ago
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    ok good so y is a constant the point (-3, 8) has what y value? (it lies on the line so all points have the same y value)

  11. MrNood
    • one year ago
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    yes y=8 is correct answer

  12. Agl202
    • one year ago
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    :D Thx... for the first one: the slope is 1

  13. MrNood
    • one year ago
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    \[slope = \frac{ y _{2} - y _{1}}{ x _{2}- x _{1} }\] the slope is not 1

  14. Agl202
    • one year ago
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    -1

  15. MrNood
    • one year ago
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    no use the equation above

  16. MrNood
    • one year ago
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    |dw:1442266895084:dw| |dw:1442266952357:dw|

  17. MrNood
    • one year ago
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    use the above to write down y2-y1 = ? x2-x1= ?

  18. zpupster
    • one year ago
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    4.0 not 0,4

  19. MrNood
    • one year ago
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    sorry - yes - my drawing is correct but the table is wrong

  20. MrNood
    • one year ago
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    |dw:1442267369262:dw|

  21. zpupster
    • one year ago
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    6-0/2-4

  22. MrNood
    • one year ago
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    @zpupster this is for @Agl202 please let hinm answer @agl - I am outta here soon - are you going to answer?

  23. MrNood
    • one year ago
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    since you don't know haw to calculate slope - HOW do you know that is correct?

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