Clarification for Practice Test, #3

Even though this came up during the review session on Monday, I still felt it would be helpful:

For number 3, it's asking to find the graph of f(x) after its transformation. You scale the graph by a factor of 1/2 and not 2 because you can set the function to equal y. (it works because for any x you plug into the function, you will get a y out.)

1/2(f(x/3))=y
2*1/2(f(x/3))=2*y
f(x/3)=2*y

now you can see that the original graph is being scaled by 1/2 because you do the inverse operation when graphing.