graph of function

[noddy]

The task is
Graph the following function y= 4+3cos(pi x)
I was wondering if since there is no acrophase or what it is called if it would not ''move''.

 

[jsterkel]

What have you tried so far?

I recommend plugging in a few values.

where x = 1, we get
y= 4+3cos(1pi)

What does y equal?

Where x = .5, we get
y= 4+3cos(.5pi)

etc...

Is there a pattern here?

What happens at 3 pi? 5 pi? 7pi?