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Math Help - Is this right? Graphing an Equation

  1. #1
    Newbie BeachLover's Avatar
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    Is this right? Graphing an Equation

    I have a fairly good concept of how to solve for y, at least I think I do.
    I have this equation and I would like to know if I solved it correctly.
    Thank you for any help, I have rarely seen the y like this.

    y-3x= -2 and 6x-2y= 4
    I am supposed to graph these and then determine if they are parallel, intersect, or if they are the same line.

    I have this:

    y=3x-2 and y= -3x-2
    I have determined that they do intersect, and meet at the point (0,-2)
    Is this right?

    Thanks,
    Anna
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  2. #2
    Air
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    Quote Originally Posted by BeachLover View Post
    I have a fairly good concept of how to solve for y, at least I think I do.
    I have this equation and I would like to know if I solved it correctly.
    Thank you for any help, I have rarely seen the y like this.

    y-3x= -2 and 6x-2y= 4
    I am supposed to graph these and then determine if they are parallel, intersect, or if they are the same line.

    I have this:

    y=3x-2 and y= -3x-2
    I have determined that they do intersect, and meet at the point (0,-2)
    Is this right?

    Thanks,
    Anna
    An equation for the linear line is y=mx+c where y,x are the variables, m is the gradient (slope) and c is the y-intercept (where it crosses y-axis).

    y-3x=-2
    y = 3x-2 Which is the solution that you got.

    6x-2y= 4
    -2y=4-6x
    y=3x-2 You had a sign error here.

    Both lines are the same, with a gradient of 3 and a y-intercept of -2.
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  3. #3
    Newbie BeachLover's Avatar
    Joined
    Feb 2009
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    Willow Spring
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    AH!!
    I see where I messed up.
    Thank you so much!!
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