The data below has been taken for the reaction of a dye with the hydroxide ion. The reaction was performed at two different hydroxide ion concentrations while the dye concentration was kept constant. What is the rate law?

[OH─] = 0.10 M [OH─] = 0.20 M
t (min) Abs ln(Abs) Abs ln(Abs)
0 1.000 0.000 1.000 0.000
1 0.905 -0.100 0.678 -0.389
2 0.811 -0.209 0.451 -0.796
3 0.735 -0.308 0.288 -1.245
4 0.664 -0.409 0.185 -1.687

I don't even know when to start. Can Someone do generic steps for a problem like this so i can understand how to do them?