A picture of a woman with a bow and a glowing arrowA picture of a woman with a bow and a glowing arrow
Abstract fish made of glowing lines on a light backgroundAbstract fish made of glowing lines on a light background
Creative geometric pattern in the form of a flowerCreative geometric pattern in the form of a flower
Abstract lines of different colors and bright shadesAbstract lines of different colors and bright shades
В математике: всякая непрямая линия. Кривая линия, изображающая рост или падение чего-н. в развитии какого-н. процесса.