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how do I write the equation of the graph?

Tell me what the graph of y = cos x looks like.

its (0,1) (pi,-1) (2pi,1) (3pi,-1) etc

but with the dots in um the up and down motions (from half of 0 and pi , pi and 2pi,

So what is the difference between this one and cosx?

its sin ? and the graph is given but I don't know how to get an equation

nvm its cos

a = 3

so y = 3cos.. bx

every 3pi?

or every 6pi/2?

6pi/2

OH

y=3cos (6pi)x ?

2pi/6pi = pi/3pi

The pi will cancel out. so b = ?

yes sorry

1/3

Yes. Put them all together and the curve represented in the graph is: y = 3cos(1/3*x)

okay thank you!! a lot!

You are welcome.