Here again are the values:

x	-3	-2	-1	0	1	2	3
f(x) = 3(2x)	3 8	3 4	3 2	3	6	12	24

Notice that each entry in the f(x) row is double the entry before it. Therefore, increasing x by 1-unit increases the value of f(x) by a factor of 2 (Choice D).

To return to the tutorial, close this window