If \(\Delta x = x\) for \(x \ge 0\) and \(\Delta x =2x\) for \(x < 0, \dfrac{\Delta 30}{\Delta(-5)}=\)

[Gmat_mission]

If \(\Delta x = x\) for \(x \ge 0\) and \(\Delta x =2x\) for \(x < 0, \dfrac{\Delta 30}{\Delta(-5)}=\)

A. -12
B. -6
C. -3
D. 6
E. 30

Answer: C

Source: Princeton Review