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sammietaygreen

  • one year ago

Determine which is the graph of the function. f(x) = {3x + 2 if < 5; -3x - 2 if x ≥ 5

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  1. freckles
    • one year ago
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    Do you know how to graph y=3x+2?

  2. sammietaygreen
    • one year ago
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    My teacher allows us to use graphing calcs so yes

  3. freckles
    • one year ago
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    ok well I would draw y=3x+2 on a paper and erase the part of the line that comes after x=5 and put a hole at x=5 since it is says f(x)=3x+2 when x<5 (which means this part does not include what happens at x=5)

  4. freckles
    • one year ago
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    then on that same paper (the same graph) draw y=-3x-2

  5. freckles
    • one year ago
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    but for it erase every part of that line that comes before x=5

  6. sammietaygreen
    • one year ago
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    Okay one sec. Lemme start that and see if i get it.

  7. sammietaygreen
    • one year ago
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    |dw:1441828029756:dw| would it look something like this?

  8. freckles
    • one year ago
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    well you have some overlapping x values there

  9. freckles
    • one year ago
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    |dw:1441828111827:dw|

  10. sammietaygreen
    • one year ago
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    okay so the concept of the lines I get and the dots are to show whether it's greater than or less than

  11. freckles
    • one year ago
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    the dots are there if you have the equal the holes are there if you don't have the equals part

  12. freckles
    • one year ago
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    @sammietaygreen

  13. sammietaygreen
    • one year ago
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    What happens when I have 3 equations??

  14. freckles
    • one year ago
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    you do the same thing

  15. freckles
    • one year ago
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    graph all three and look at the intervals to figure out where to erase

  16. sammietaygreen
    • one year ago
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    ugh none of the graphs are matching what I'm getting

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spraguer (Moderator)
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