The graph on the left is of the basic sin function. The sin function has a period of 2π and an amplitude of one. The following is a transformed sin function    y = 2 sin 3x   The amplitude of this function is 2 and the period is the period of the sine function(2π) divided by the coefficient of the angle.  
In this case (2π)/3  So if you were to graph this sin function the period would be from zero to 2.09 radians instead of zero to 6.28 radians. The amplitude of the sin function is always the absolute value of the number in front of the sin. graph of y = 2 sin 3x


What are the amplitude and period of   -3 sin 4x ? answer

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