2 quick algebra questions

Discussion in 'Community Discussion' started by rdf8585, Jul 10, 2006.

  1. rdf8585 macrumors regular

    Joined:
    Feb 15, 2006
    #1
    1. Does y = |x|-5 and y= |2x|-5 have the same domain and/or range?

    2. Does y = -x^2+5 and y = -1/2x^2+5 have the same domain and/or range?

    Domains and ranges totally befuddle me, and I don't have a graphing calculator, which some people said might help.
     
  2. Roric macrumors regular

    Joined:
    Sep 29, 2005
    Location:
    WI
    #2
  3. Josh macrumors 68000

    Josh

    Joined:
    Mar 4, 2004
    Location:
    State College, PA
    #3
    An easy and basic way to remember things...

    domain: the intervals of the X-axis the equation occupies (how "long" the total graph would go horizontally left and right).

    range: the intervals of the Y-axis the equation occupies (how "tall" the total graph would be)
     
  4. Stinkythe1 macrumors regular

    Joined:
    Mar 30, 2005
    #4
    It's amazing how quick you can forget this stuff. I had college algebra 2 years ago and I'm clueless as to how to start on that problem...

    Oh well. :D
     
  5. swiftaw macrumors 603

    swiftaw

    Joined:
    Jan 31, 2005
    Location:
    Omaha, NE, USA
    #5
     

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