1) It apears you MUST use the SINE functions. Great. What are the characteristics of the function y = sin(x)?

1a) Starts at zero:

1b) It first goes in the positive direction.

1c) Period is

1d) Amplitude is 1

2) Now let's take a look at your graph.

2a) Starts at zero: - Good.

2b) It first goes in the positive direction. - Good.

2c) Period is - Nope. We have I think. The drawing is not real clear.

2d) Amplitude is 1 - Nope. It appears to be 0.80

3) Okay, so how do we fix it?

3a) Starts at zero: -- y = sin(x)

3b) It first goes in the positive direction. -- y = sin(x)

3c) Period is -- --

3d) Amplitude is 1 --

I think we're done.