Alg 1.

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The local zoo keeps track of how many dragonflies are breeding in their insect exhibit each day.
Day: 1, 2, 3, 4, 5
Dragonflies: 9, 18, 36, 72, 144
It's exponential growth.
A. Write an equation for the function that models the data.
B. Use your equation to determine the # of dragonflies that will be breeding after 9 days

  • Alg 1. -

    look at this chart

    1 9 = 9(2^0)
    2 18 = 9(2^1)
    3 36 = 9(2^2)

    did you notice the pattern

    dragonflies = 9(2^(day - 1) )

    so when day = 9
    we have 9(2^8) = 2304

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