Negative time is a peculiar quirk of quantum mechanics, like the possibility of an object being in two places at one time (think: Schrodinger’s cat) or two particles existing in the same state ...

A distance-time graph, sometimes referred to as a travel ... A return journey is not given a negative value as it is not completed in reverse or backwards. Speed is worked out by dividing distance ...

For the constant negative acceleration graphs the initial displacement is negative and the initial velocity is positive. The velocity time graphs give all three variables for motion–velocity ...