Guys I need help with these help me please !!

Answer:Sequence 1Step-by-step explanation:You need to find the difference between term - the nth term.The difference / nth term has to to -1/2 (-0.5)Sequence 1:-6 * -0.5 = 3 * -0.5 = -3/2 (-1.5) * -0.5 = 3/4 (0.75) * -0.5 = -3/8 (-0.375)Sequence 2:4 * -2 = -8 *-2 = 16 * -2  = - 32 * -2 = 64Sequence 3:-1/3 ÷ 2 = -1/6 ÷ 2 = 12 ÷ 2 = 24 ÷ 2 = 48Sequence 4:400 ÷ -2 = -200 ÷ -2 = 100 ÷ -2 = -50 ÷ -2 = 25The only sequence with a common ratio of -1/2 is Sequence 1.