Consider the function y = -2 - 3cos(x + π) . What effect does the π have on the basic graph?

Question

anonymous · Answer

A.	Horizontal shift left π units
B.	Vertical stretch by factor π
C.	Horizontal shift right π units
D.	Vertical shift down π units

anonymous · Answer

@mary.rojas @Mertsj

anonymous · Answer

It looks like it shifted down when I look at the graph... http://www.wolframalpha.com/input/?i=y+%3D+-2+-+3cos%28x+%2B+π%29

mertsj · Answer

The -2 is the vertical shift
The 3 is the amplitude
The pi is the horizontal shift.  If it is positive it is a shift to the left.  If it is negative, it is a shift to the right.

anonymous · Answer

A. Horizontal shift left π units

mertsj · Answer

yep

anonymous · Answer

By any chance do you know the minimum value of y = sin x?

mertsj · Answer

Are you familiar with the unit circle?

anonymous · Answer

yes?

mertsj · Answer

Remember the sin is like y.  What is the minimum y value on the unit circle?

anonymous · Answer

so is it -1?

mertsj · Answer

yes.