The interval is [6,8]. Plug the ends of the interval into the equation:
[tex]x = 6[/tex]
[tex]\frac{3(6) - 6}{6 - 2} = \frac{12}{4} = 3[/tex]
[tex]x=8[/tex]
[tex]\frac{3(8) - 6}{8-2} = \frac{18}{6} = 3[/tex]
Both x-values have the same output of 3, so the average rate of change over the interval will be 0.
The answer is A. 0.
