think you meant</font></font></font></span><span class=260144219-02052002></span><span class=260144219-02052002><font face="Arial"><font color="#0000FF"><font size=-1>velocity
= rate of change of distance + direction</font></font></font></span><span class=260144219-02052002><font face="Arial"><font color="#0000FF"><font size=-1>acceleration
= rate of change of velocity</font></font></font></span><span class=260144219-02052002></span><span class=260144219-02052002><font face="Arial"><font color="#0000FF"><font size=-1>So,
the underlying quantity being measured is sales (equivalent to distance)</font></font></font></span><span class=260144219-02052002><font face="Arial"><font color="#0000FF"><font size=-1>growth
in sales per quarter is equivalent to velocity</font></font></font></span><span class=260144219-02052002><font face="Arial"><font color="#0000FF"><font size=-1>rate
of change of growth per quarter is acceleration of growth.</font></font></font></span> <font face="Arial"><font size=-1>Aloha,</font></font> <font face="Arial"><font size=-1>Mike