need help with these

Which one is the best statement for Beer-Lambert law? The absorbance of light by a substance is directly proportional to that substance's concentration; that is, A=kc, where k is the proportionality constant. The absoibance of light by a substance is inversely proportional to that substance's concentration; that is, A=k/c, where k is the proportionality constant. The absorbance of light by a substance is directly proportional to that substance's temperature; that is, A=kT, where k is the proportionality constant. The absorbance of light by a substance is inversely proportional to that substance's concentration; that is, A=k/T, where k is the proportionality constant. Calculate the value of Keq from the following equilibrium concentration; (3sf) [FeNCS2+]=1.71104M [Fe3+]=8.28104M [NCS]=4.28104M