This leads to the following definition. {{CMD_64}}{{CMD_65}}{{CMD_66}} Let {{MATH_67}} be a function which is continuous on the interval {{MATH_68}}. We define the {{CMD_69}} of {{MATH_70}} on {{MATH_71}} by {{MATH_72}} {{CMD_73}} The definite integral is a number that gives the net area of the region between the curve {{MATH_74}} and the {{MATH_75}}-axis on the interval {{MATH_76}}. {{CMD_77}} The graph a function {{MATH_78}} on the interval {{MATH_79}} is given in the figure. The areas of four regions that lie either above or below the {{MATH_80}}-axis are labeled in the figure.