type EndPoint = 'full' | 'empty';
/** `correct` is set in evaluate mode only. */
export type PlottedElement = {
    correct?: boolean;
} & ({
    type: 'point';
    pointType: EndPoint;
    position: number;
} | {
    type: 'line';
    leftPoint: EndPoint;
    rightPoint: EndPoint;
    position: {
        left: number;
        right: number;
    };
} | {
    type: 'ray';
    direction: 'positive' | 'negative';
    pointType: EndPoint;
    position: number;
});
interface DescriptionContext {
    fraction?: boolean;
    language?: string;
}
export interface NumberLineLabelInput extends DescriptionContext {
    domain: {
        min: number;
        max: number;
    };
    ticks: {
        minor: number;
        major: number;
    };
    width: number;
}
/** Names the number line by its range and its tick spacing as drawn, after the width-based limits. */
export declare function labelNumberLine({ domain, ticks, width, fraction, language }: NumberLineLabelInput): string;
/** Describes each plotted element: its position, whether each endpoint is included, a ray's direction and, in evaluate mode, its correctness. */
export declare function describePlottedElements(elements: readonly PlottedElement[], { fraction, language }?: DescriptionContext): string;
export {};