When her car would not start Joan began to solve the problem by turning on headlights see whether battery was dead Her approach is an example of?

Joan's approach is an example of the trial-and-error method. This method involves trying different solutions to a problem until one works. In Joan's case, she is trying to figure out why her car won't start. She starts by turning on the headlights to see if the battery is dead. If the headlights do not come on, then she knows that the battery is dead and she can replace it.