Determine a mapping of the form (x, y) --> (_, _) from y = f(x) for each of the following.
y=3f(2x)
y=−1/4f(7x)
y=−2f(−2/3x)
Hi, I think these are the correct answers...
1. (2x, 6y)
2. (7x, -7/4y)
3. (-2/3x, 4/3y)
+5 
