Determine the Equation of the Graph $\frac { 7 } { \pi }$

question 269

Multiple Choice

Determine the equation of the graph.
-A weight attached to a spring is pulled down 3 inches below the equilibrium position. Assuming that the frequency of the system is $\frac { 7 } { \pi }$ cycles per second, determine a trigonometric model that gives the position of the weight at time $t$ seconds.

• A) \(s ( t ) = 3 \pi \cos 7 t\)
• B) \(s ( t ) = - 3 \cos \frac { 7 } { \pi } t\)
• C) \(s ( t ) = 3 \cos 14 t\)
• D) \(s ( t ) = - 3 \cos 14 t\)

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