Inequalities that use < or > symbols are plotted with a dashed line to show that the line is not included in the region. Inequalities that use ≤ or ≥ symbols are plotted with a solid line to show that ...

Since their emergence, cities acted as major engines of economic and social development. The rising impact of urban life is testified by the 2018 Revision of UN’s World Urbanization Prospect, showing ...

Show values that satisfy an inequality on a set of axes by drawing the line of the corresponding equation and shading the area specified in a question. Include a dashed line for inequalities where the ...