a) Compute each of the following expressions and interpret each as an average rate of change:

(i) $\ \ \ \frac{f( 4 ) - f(0)}{ 4 - 0} = \ $

(ii) $\ \ \frac{f( 6 ) - f( 4 )}{6 - 4 } = \ $

(iii) $\ \frac{f( 6 ) - f(0)}{6 - 0} = \ $

b) Based on the graph sketched below, match each of your answers in (i) - (iii) with one of the lines labeled A - F. Type the corresponding letter of the line segment next to the appropriate formula. Clearly not all letters will be used.

(click on image to enlarge)

	$\frac{f( 4 ) - f(0)}{ 4 - 0}$
	$\frac{f( 6 ) - f( 4 )}{6 - 4 }$
	$\frac{f( 6 ) - f(0)}{6 - 0}$