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Math Help - graph problem..

  1. #1
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    graph problem..

    Stats whether they are parellel perpendicular or neither by working out the gradients....

    i) y= -4 x= 2

    i have a general idea that the formula y=mx-c is involed, or am i wrong ?Also, how do i solve this question ?
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  2. #2
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    e^(i*pi)'s Avatar
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    It is involved but you have only one line...

    for parallel lines m is the same

    for perpendicular lines m_1m_2 = -1
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  3. #3
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    so how can i solve it...because thats all its given in the question
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