Answer:
The correct answer for this question is this one:
If the x position of the vertex for f(x) is k then :
1. f(k) => 4x+3=k, x = (k-3)/4 = (k/4)-(3/4)
2. x = k+3
3. x = (k+1)/2 = (k/2)-(1/2)
4. x = 2(k+2) = 2k+4
5. x = k+7
6. x = k-3
7. x = k-2
So the order depends on the original position of the vertex k, e.g for k=0 the positions would be:
1. -3/4
2. 3
3. -1/2
4. 4
5. 7
6. -3
7. -2
So, therefore, the order would be 6 7 1 3 2 4 5