Without Graphing the Function, Determine Its Amplitude or Period as Requested

question 220

Multiple Choice

Without graphing the function, determine its amplitude or period as requested.
- $y = - 4 \cos \frac { 1 } { 3 } x \quad$ Find the amplitude.

• A) \(\frac { 4 \pi } { 3 }\)
• B) 4
• C) \(\frac { \pi } { 4 }\)
• D) \(6 \pi\)

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Definitions:

Random Walk

A theory suggesting that the price movements of securities are unpredictable and random, making it impossible to consistently predict their future movements based on past trends.

Stock Prices

The current market price at which a share of a company is bought or sold.

Price Changes

Adjustments in the price levels of goods, services, or securities in the market.

Market Efficiency

A financial market attribute where prices of securities fully reflect all available information at any moment in time.