Exponential Functions Pre-Test

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Front

Determine if the table represents a linear function or an exponential function. Explain.

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Exponential. As x increases by 1, y is multiplied by 1/2.

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Allison starts with $100. She invests this money in an account that promises to double her money every year. Let y = account balance ($) and x = # of years.

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A school's enrollment is 500 students, and is expected to decrease 5% each year. Let y = number of students enrolled and x = # of years. Write a function that represents the scenario.

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neither

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exponential decay

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exponential growth

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Write the explicit equation for the nth term for the following geometric sequence: {4, 12, 36, 108,...}

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Write the explicit equation for the nth term for the following arithmetic sequence: {-8, -2, 4, 10, 16...}

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