Determine the Equation of the Graph $= 2 \pi \sqrt { 0.21875 }$

Multiple Choice

Determine the equation of the graph.
-Determine the period and frequency of oscillation when a pendulum of length 7 feet is released after being displaced 2 radians. Round constants to 8 decimal places, if necessary.

A) Period $= 2 \pi \sqrt { 0.21875 }$ sec, frequency $= \frac { 1 } { 2 \pi } \sqrt { 4.57142857 }$ cycles per sec
B) Period $= 2 \pi \sqrt { 4.57142857 }$ sec, frequency $= \frac { 1 } { 2 \pi } \sqrt { 0.21875 }$ cycles per sec
C) Period $= 7 \pi \mathrm { sec }$ , frequency $= \frac { 1 } { 7 \pi }$ cycles per sec
D) Period $= \frac { \pi } { 7 }$ sec, frequency $= \frac { 7 } { \pi }$ cycles per sec