Question:

Which best describes the relationship between the lines with equations 8x+y=6 and 16x+ 2y=0?

by  |  earlier

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please help, my choices are

a. perpendicular

b. parallel

c.samce line

d. neither parallel nor perendicular

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5 ANSWERS


  1. B

    2(8x +y) = 12

    16x + 2y = 0

    parallel

    a is multiple of b ... with different constant solutions[not same line]


  2. rearrange the equation in standard form like this:

    y= 6 - 8x

    y= (0/2) - (16/2)x

    Look carefully.

    Perpendicular == when one eqn has negative inverse slope of the other

    Parallel==  when the two eqns share the same slope

    wtf is a samce line?... don't bother. I don't care!

    I think now you can solve the problem.

  3. B. parallel

    Their slopes are the same. If any two lines have the same slope, then they are parallel.

    8x + y = 6

    y = -8x +6

    16x + 2y = 0

    2y = -16x

    y = -8x

    Both lines have a slope of -8. Therefore, they're parallel.

  4. Let's solve each in terms of y:

    Line 1:

    8x + y = 6

    y = -8x + 6

    Line 2:

    16x + 2y = 0

    2y = -16x

    y = -16x / 2

    y = -8x

    These lines have the same slope (-8) but different y-intercepts (6 for line 1 and 0 for line 2).

    Lines with the same slope but different intercepts are parallel.

    Answer:

    b. parallel


  5. b. parallel

    The slope is the same, the line is just shifted up or down 6 units

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