Determine the Amplitude or Period as Requested $y = \frac { 9 } { 8 } \cos \frac { 4 \pi } { 7 } x$

question 312

Multiple Choice

Determine the amplitude or period as requested.
-Period of $y = \frac { 9 } { 8 } \cos \frac { 4 \pi } { 7 } x$

• A) \(\frac { 7 } { 2 }\)
• B) \(\frac { 8 \pi } { 7 }\)
• C) \(\frac { 9 \pi } { 4 }\)
• D) \(\frac { 4 } { 9 }\)

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