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Laabri

2.1 Can We Predict Stock Values?

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Last updated almost 3 years ago
9 Nsɛmmisa

Functions help us understand how one quantity changes with respect to another. This is especially important when our money is involved. Today we’re going to study the value of a stock in a large sportswear corporation over a one-month period.

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7.

Is the rate of change of S increasing or decreasing over the interval [3,9]?

How can you tell based on the graph?

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The table shows data for the value of a stock on the tth day of February.

No graphing allowed.

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1.

Is there a linear relationship between the day and the value of the stock? How do you know?

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2.

Is there a quadratic relationship between the day and the value of the stock? How do you know?

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3.

Any guesses on the type of relationship between the day and the value of the stock? How do you know?

A graph of S is shown.

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4.

Estimate the first time that the value of the stock starts to decrease.

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5.

Does the value of the stock ever reach $0? Explain.

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6.

On which day during this 28-day period is the value of the stock the highest? What is the value of the stock on that day?

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8.

Use the table to calculate the average rate of change of S on the interval [3,6] and on the interval [6,9]. Were you correct?

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9.

For the first 20 days of February, use the graph to estimate the day on which the value of the stock changes the fastest.