Respuesta :
b) every x-value is unique
in a function, there are no repeating x-values (looking at a graph, the line never touches the same vertical line). there can be repeating y-values, but the each x-value must be unique
in a function, there are no repeating x-values (looking at a graph, the line never touches the same vertical line). there can be repeating y-values, but the each x-value must be unique