Please answer quickly!

What is the explicit formula for the sequence -17,-34,-68,-136...?
A. y= -2x-17
B. y= -2x-15
C. y= -15(2)x
D. y= -17(2)x-1

Please answer quickly What is the explicit formula for the sequence 173468136 A y 2x17 B y 2x15 C y 152x D y 172x1 class=