Mathematics

9th

grade

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OST Practice

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3 questions

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  • 1. Multiple Choice
    3 minutes
    1 pt

    Bryson collects data on the depth of a river at various points and the velocity of the river at those points. His data have a correlation coefficient of -0.9382.


    Which scatterplot could represent Bryson's data?

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  • 2. Multiple Choice
    3 minutes
    1 pt

    There are 250 bacteria at the start of an experiment, and this amount doubles every hour. Write a function T(h) that represents the total number of bacteria after h hours.

    T(h) = 2(250)h

    T(h) = 2h + 250

    T(h) = 2h + 250

    T(h) = 250(2)h

  • 3. Multiple Choice
    3 minutes
    1 pt

    Ryan places x golf balls into an empty basket. Each golf ball has the same weight. The weight in ounces, of the basket and golf balls can be calculated using the expression shown.


    2x + 10


    What does the term 10 represent in this expression?

    the weight of each golf ball

    the weight of the empty basket

    the number of golf balls in the basket

    the total weight of the basket and golf balls

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