Below we can see a graph of {{MATH_66}} along with the signed area measured by the accumulation function. {{CMD_67}} {{ENV_68}} {{COMMENT_69}} {{COMMENT_70}} {{CMD_71}} The accumulation function starts off at zero, and then as {{MATH_72}} grows, {{MATH_73}} is {{CMD_74}}{{CMD_75}}increasing{{CMD_76}}{{CMD_77}}decreasing{{CMD_78}}{{CMD_79}} as the function accumulates negatively signed area.