Writing Equations of Sine and Cosine Functions From a Graph

• $y=2\sin4x+1$

• $y=2\cos4x+1$

• $y=-2\cos3x-1$

• $y=-2\sin4x+1$

• $y=-3\sin x-2$

• $y=3\sin x-2$

• $y=3\cos x-2$

• $y=-3\cos x-2$

• $y=\sin\frac{1}{2}x+3$

• $y=\frac{1}{2}\sin x+3$

• $y=\cos\ \frac{1}{2}x+3$

• $y=\frac{1}{2}\cos2x+3$

• $y=3\sin2x-1$

• $y=2\sin2x-1$

• $y=-3\sin2x-1$

• $y=-3\cos2x-1$

• $y=-\cos3x+2$

• $y=\cos2x+3$

• $y=-\cos3x+1$

• $y=\sin3x+2$

• $y=3\cos4x-1$

• $y=4\cos3x-1$

• $y=3\cos4x+2$

• $y=-3\cos4x-1$

• $y=-2\cos x+2$

• $y=2\cos x+2$

• $y=-2\sin x+2$

• $y=-2\cos x$

• $y=2\cos\ \frac{1}{2}x-1$

• $y=2\sin\ \frac{1}{2}x-1$

• $y=\cos\ \frac{1}{2}x+1$

• $y=2\cos\ \frac{1}{2}x+1$

What is the amplitude of the equation?

 $y=-3\sin2x-1$  

• 3

• -3

• 2

• -1

What is the period of the equation?

 $y=-3\cos2x-1$  

• 2

• 180°

• 360°

• 3