数すう直ちょく線せん

noun

number line; real number line

Mathematical term for a line representing real numbers in order; used in graphing and teaching.

• 数すう直ちょく線せんを使つかって不ふ等とう式しきの解かいを表あらわす。

  Use a number line to represent the solution of the inequality.

• 数すう直ちょく線せん上じょうで、0より右みぎ側がわが正せいの数かずです。

  On the number line, numbers to the right of 0 are positive.