Negative correlation is defined as an inverse relationship between two entities. If entity 1 increases, entity 2 decreases and if entity 2 increases, then entity 1 decreases.
According to this definition, option 1 and 5 are right answers.
1) the number of calories consumed and the amount of weight lost by a person - if more calories are consumed, person gains weight. If less calories are consumed, person loses weight.
5) the thickness of the ice on a lake and the likelihood of falling through the ice - if the ice sheet is thick, its less likely to fall and vice versa.
