Question

y=4cos(1/2x + pi) - 1
Amplitude______
Period_____
Phase Shift______

Answer 1

The amplitude is what is in front of cos,
meaning the amplitude is 4

Answer 2

B = 1/2, so

2pi/1/2 = 4pi
That is your period

Answer 3

I believe your phase shift is -1 because that shifts your entire graph

Answer 4

are you sure it's not pi?

Answer 5

The phase shift is the only one I am not sure about. No i am not sure it's not pi. I can see how you think that because phase shift is usually associated with what is in the parenthesis. If it does go by that, then the answer would be -1/2pi because that would cancel out the other pi.
Does that make sense?

Answer 6

yes thank you!