The type of graph which should be used to represent the given data is a histogram.
Weights(Kg)40−4545−5050−5555−6060−65No.of Person1512131618.
Histogram
The given data are grouped into classes. Hence the graph that should be used to represent them is a histogram. Because, a histogram is a graphical display where the data is grouped into ranges (such as "100 to 149", "150 to 199", etc), and then plotted as bars.