A line whose points represent real numbers.
A line on which every point represents a real number, usually increasing in value from left to right.
a line that shows numbers ordered by magnitude from left to right or bottom to top; an arrowhead at each end indicates that the line continues endlessly in both directions.
a line on which numbers can be written or visualized.
A line in which points all correspond to numbers.
A number line is a line in which real numbers can be placed, according to their value. Each point on a number line corresponds to a real number, and each real number has a unique point that corresponds to it. For example, the number 1.5 (1 1/2) corresponds to the point on a number line that is halfway between one and two.
A line on which each point represents a real number.
A number line is a one-dimensional picture in which the integers are shown as specially-marked points evenly spaced on a line. Although this image only shows the integers from -9 to 9, the line includes all real numbers, continuing "forever" in each direction. It is often used as an aid in teaching simple addition or subtraction, especially involving negative numbers.