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Thread: graphing: Will graph of y = 2x + 7 pass below the origin?

  1. #1

    graphing: Will graph of y = 2x + 7 pass below the origin?

    True or False: The graph of y=2x+7 will pass below the origin.

    Why is this false?

  2. #2
    Elite Member
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    Re: graphing

    y = mx + b

    y-intercept is y = 7.

    Generally, +7 is considered "above" the origin.

  3. #3

    Re: graphing

    What if x=-20 then y would equal -33?

  4. #4
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    Re: graphing

    "pass below" implies x = 0.

    On a highway, are you "below" a bridge when you are 20 miles from the bridge?

  5. #5

    Re: graphing

    So are you saying it would have to be on the y axis?

  6. #6
    Elite Member stapel's Avatar
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    Quote Originally Posted by srgdean
    So are you saying it would have to be on the y axis?
    Try graphing the line. Look at the picture. Compare the line with the location of the origin. What do you see?

    Eliz.

  7. #7
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    Re: graphing

    Quote Originally Posted by srgdean
    So are you saying it would have to be on the y axis?
    That is what "pass below" means to me.

  8. #8

    Re: graphing: Will graph of y = 2x + 7 pass below the origin?

    Thanks, I see now.

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