Graph the function over a two-period interval. Give the period and amplitude. y equals negative 8 cosine 3 x Question content area bottom Part 1 The amplitude is enter your response here. (Simplify your answer.) Part 2 The period is enter your response here. (Simplify your answer. Type an exact answer using pi as needed. Use integers or fractions for any numbers in the expression.) Part 3 Choose the correct graph below. A. -9 9 x y font size decreased by 2 StartFraction 2 pi Over 3 EndFraction font size decreased by 2 negative StartFraction 2 pi Over 3 EndFraction A coordinate system has a horizontal x-axis labeled from negative StartFraction 2 pi Over 3 EndFraction to StartFraction 2 pi Over 3 EndFraction in increments of StartFraction pi Over 6 EndFraction and a vertical y-axis labeled from negative 9 to 9 in increments of 1. A sinusoidal curve ranges from negative 8 to 8 and completes one cycle in an interval of length StartFraction 2 pi Over 3 EndFraction. The curve attains the value negative 8 at x=StartFraction pi Over 6 EndFraction. B. -9 9 x y font size decreased by 2 StartFraction 2 pi Over 3 EndFraction font size decreased by 2 negative StartFraction 2 pi Over 3 EndFraction A coordinate system has a horizontal x-axis labeled from negative StartFraction 2 pi Over 3 EndFraction to StartFraction 2 pi Over 3 EndFraction in increments of StartFraction pi Over 6 EndFraction and a vertical y-axis labeled from negative 9 to 9 in increments of 1. A sinus