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

question 202

Multiple Choice

Without graphing the function, determine its amplitude or period as requested.
- $y = \frac { 3 } { 4 } \sin \left( - \frac { 4 \pi } { 5 } x \right) \quad$ Find the amplitude.

• A) \(\frac { 3 } { 8 }\)
• B) \(\frac { 8 \pi } { 3 }\)
• C) \(\frac { 4 \pi } { 5 }\)
• D) \(\frac { 5 } { 2 }\)

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