Help with Chemistry Kinetics: Half-Life Calculation

[marcuss]

Need Help!-Chemistry kinetics

1. Consider the following initial rate data for the decomposition of compound AB to give A and B:
[AB]o(mol/L) Initial Rate(mol/L*s)
.200 3.20*10^-3
.400 1.28*10^-2
.600 2.88*10^-2

2. Determine the half-life for the decomposition reaction initially having 1.00M AB present.

3. If someone could just give me a clue what to do i would really appreciate it, thank you

 

[Borek]

How does the initial rate depend on the concentration? What is the order of the reaction?