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celinegirl

  • one year ago

Keira created color panels for a wall using a mix of only red and blue paints. She plotted the quantities of red and blue paints used for each mix and connected them using a line segment, as shown in the graph below:

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  1. celinegirl
    • one year ago
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  2. celinegirl
    • one year ago
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    Which statement best describes the domain of the function represented in the graph? 3 ≤ x ≤ 12 or x is between 3 and 12, inclusive 3 ≤ x ≤ 7 or x is between 3 and 7, inclusive 2 ≤ x ≤ 12 or x is between 2 and 12, inclusive 2 ≤ x ≤ 7 or x is between 2 and 7, inclusive

  3. phi
    • one year ago
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    the domain are the "x values" this should be obvious, because ll the choices are about "x" to find the x values, put you pencil on the left end point of the line, and go "straight down" what x number to you reach ?

  4. celinegirl
    • one year ago
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    @phi Ah I see.. I might be wrong but I think its A.

  5. phi
    • one year ago
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    put you pencil on the left end point of the line, and go "straight down" what x number to you reach ?

  6. celinegirl
    • one year ago
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    @phi 2?

  7. phi
    • one year ago
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    go straight down (like the red line). what number are you at ?

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  8. celinegirl
    • one year ago
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    @phi oh 3

  9. phi
    • one year ago
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    now do the same for the right end point of the line. put your pencil on the right end, and go straight down. what x number are you at ?

  10. celinegirl
    • one year ago
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    @phi 7 right?

  11. phi
    • one year ago
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    that means the line is "defined" from x =3 to x=7 that is the domain.

  12. celinegirl
    • one year ago
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    @phi ah i see. So its B?

  13. phi
    • one year ago
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    yes

  14. celinegirl
    • one year ago
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    @phi thank you so much!

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