To draw a velocity-time (VT) graph from a distance-time (DT) graph, calculate the velocity using the formula v = Δs/Δt, where Δs is the change in distance and Δt is the change in time. For unit conversions, to convert 175 kg·m/h² to g·cm/s², multiply by conversion factors that allow for cancellation of units. It's essential to maintain the integrity of the units by creating "1" from the target units in the numerator and existing units in the denominator. This method ensures accurate conversions step by step. Understanding these principles will facilitate both graph drawing and unit conversions effectively.