Physical or chemical property?

smell of vinegar
explosiveness of a firework
reactivity of iron with oxygen
the color of iron wire
the luster of platinum jewelry
the melting point of sugar
the flammability of acetone

The graph indicates the running route for tobias. which best describes his run? from time 0 to 6, he went fast and then slowed down. from time 6 to 10, he was at his slowest. from time 12 to 14, he went very slow. from time 14 to 18, he went toward the starting point.