R programming:

The following table shows the relative frequencies and cumulative proportions for the average number of injuries for several firms. Build the associated histogram and its density line.

Average number of injuries per thousand man-hours	Number of firms	Relative frequency	Cumulative Proportion
1.5 - 1.7	3	0.06	0.06
1.8 - 2.0	12	0.24	0.3
2.1 - 2.3	14	0.28	0.58
2.4 - 2.6	9	0.18	0.76
2.7 - 2.9	7	0.14	0.9
3.0 - 3.2	5	0.1	1
	Total 50	Total 1.00