[The leftmost x-coordinate is and the rightmost
x-coordinate is . They are partly cut off in
the picture above.]
The period of a function is the distance along the x-axis
from the beginning of a figure until it starts repeating
same figure
The round hump figure starts at and ends (and
starts over at . That's a distance along the x-axis
of = = =
So its period is .
You can always get the period by subtracting the x-coordinate
at the beginning of any repeating figure from the x-coordinate
at the end of the repeating figure.
You could also get the period from the beginning and end of the
second round hump figure:
= = =
or from the beginning and end of the third hump:
= =
or from the fourth hump
= <--the easiest way to find the period!
or the fifth or sixth hump.
Edwin
.