$\"\"$

The function is $\"\"$ .

The above function compare with $\"\"$ ,

here the amplitude is $\"\"$ , and the period is $\"\"$

The amplitude is $\"\"$ (The coefficent of $\"\"$ )

The period is $\"\"$ (Substitute $\"\"$ ) $\"\"$

Use the amplitute and period to graph the function.

Draw a coordinate plane

Draw the function $\"\"$ .

$\"graph$ $\"\"$

The amplitude is 3 and period is $\"\"$ .