Which of the following are functions that are also one-to-one? {{CMD_142}} {{CMD_143}}Mapping words to their meaning in a dictionary.{{CMD_144}} {{CMD_145}}Given a runner racing forward on a straight path, mapping time to the position of the runner.{{CMD_146}} {{CMD_147}}Mapping people to their birth date.{{CMD_148}} {{CMD_149}}Mapping mothers to their children.{{CMD_150}} {{CMD_151}} {{CMD_152}}{{CMD_153}} {{CMD_154}} {{CMD_155}} Since words may have more than one definition, ``relating words to their definition in a dictionary'' is not a function. {{CMD_156}} Since the runner is running forward on the straight path, every time corresponds to a position, and every position corresponds to a time. So this gives a one-to-one function. {{CMD_157}} Since every person only has one birth date, ``relating people to their birth date'' is a function. However, many people have the same birth date, hence this function is not one-to-one. {{CMD_158}} Since mothers can have more (or less) than one child, ``relating mothers to their children'' is not a function. {{CMD_159}} {{CMD_160}} {{CMD_161}}