Graphing Inequalities

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  • October 10, 2014 at 10:42 am #3239
    Anonymous
    Inactive

    Hi Bill,

    In 6th grade, when we graph inequalities, do we show the open dot and closed dot? Or do we just do greater than or less than?

    November 3, 2014 at 4:36 pm #3261
    Bill McCallum
    Keymaster

    Well, if you introduce the ≤ and ≥ symbols then you should also introduce the open and closed dot notation for graphing. The standards don’t call for either of these things, however; it’s really a curricular decision whether to introduce them. Certainly the focus in middle school is on equations, not inequalities.

    January 10, 2019 at 9:31 am #5977
    anon
    Member

    The 7th grade standard for inequalities (7.EE.B.4.B) states “Graph the solution set of the inequality…”

    The 6th grade standard (6.EE.B.8) says “represent solutions of such inequalities on number line diagrams.”

    I’m curious about the different language used between the two standards. Are we expecting 7th graders to graph a solution set to an inequality in a coordinate plane or still just on a number line?

    July 24, 2019 at 12:12 pm #6088
    Cathy Kessel
    Participant

    6.EE.8 and 7.EE.4b are both about inequalities in one variable. A number line can show solutions for that type of inequality. When students deal with inequalities with two variables, the coordinate plane is needed for graphing solutions.

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