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    Is 2y =2 - x perpendicular to y = 5 - 2x?
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    Re arrange the first equation to be in the form y=mx+c.
    See whether the two gradients times to equal -1 (rule of perependicularity)
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    (Original post by 0100100101001101)
    Is 2y =2 - x perpendicular to y = 5 - 2x?
    write both in the form  \displaystyle y= mx + c and see if both gradients multiply to equal -1
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    Ok thanks BobBobson and DylanJ42
 
 
 
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Updated: February 11, 2017
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