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    suppphalfyyy's Avatar
    suppphalfyyy Posts: 1, Reputation: 1
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    #1

    Sep 23, 2009, 04:33 PM
    Algebra 2: Graphing the linear system and estimate the solution
    2x + Y = 5
    x - Y + -2




    can anyone figure this out ?
    ArcSine's Avatar
    ArcSine Posts: 969, Reputation: 106
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    #2

    Sep 24, 2009, 05:39 AM
    They are the equations of two straight lines. From your title, it sounds like you're to graph the lines and estimate the solution visually.

    Draw a standard XY graph.

    Starting with the first equation...

    Set X = 0, and solve for Y. Draw a dot on the Y-axis for this point. (I'll give you this one: it's 5).

    Then set Y = 0 in the equation, and solve for X. Draw a dot on the X-axis for this point.

    Use a ruler to draw the line through these two points.

    Repeat for the second linear equation.

    The solution is the point where the two lines intersect.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #3

    Sep 24, 2009, 09:48 AM
    Quote Originally Posted by suppphalfyyy View Post
    2x + Y = 5
    x - Y + -2




    can anyone figure this out ?
    I guess that the second one is : x - y = -2

    Draw the graph like ArcSine said, and estimate your solution.

    Tell us what you got please. You should have... (1, -3)
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