So I started working on my for my Exam and I wanted to know if I get this graph right!
So a graph is given to me
<<< this is the graph
So I looked for the amplitude and the period..
and I think that the amplitude is
[A]= 2-(-2)=4/2= 2, so amplitude is 2
Then the period I am not really sure.... I have 2pi/4= pi/2, so I assume that the period is pi/2
Now The example ask me to Find an equation for sine function for the graph
So I conclude that is y=-2sin(pi/2x-pi/2) since it looks like an inverse curve for sine.
and Now it ask me a cosine function
So I conclude that is y= 2cos(pi/2x-pi/2)
PLEASE HELP ME.... I wan't to know if I did it right!