Final answer:
The correct equations for Charles's Law are V = kT and V1/T1 = V2/T2, indicating the direct relationship between the volume and temperature of a gas at constant pressure and amount.
Step-by-step explanation:
The correct forms of the equation of Charles's Law are V = kT (where k is a constant for a given amount of gas at constant pressure) and V₁/T₁ = V₂/T₂. The latter formula represents the direct relationship between the volume and temperature of a gas, allowing us to compare the initial and final states of a gas, provided that the amount of gas and the pressure remain constant. These equations are crucial for solving problems involving a volume change caused by a temperature change at constant pressure. It is important to note that temperature must be in Kelvin (K) for Charles's Law calculations.