Posted by T.Gracken on November 10, 2002 at 07:41:25:
In Reply to: graphing posted by Kay on November 09, 2002 at 20:29:22:
: Is there any easy way to look at a graph that is a variation of the sine or cosine curve and be able to determine its equation,using the formula:y= asin(bx+c)+k?
yes!
the amplitude is |a|.
the vertical shift is k.
the phase shift (beginning of a cycle) is -c/b.
the period (length of one cycle) is 2pi/b.
now just look at the graph and figure out what those values are.