回かい帰き線せん

noun

tropics; tropical circles

Refers specifically to the Tropic of Cancer (北回帰線) and the Tropic of Capricorn (南回帰線). Used in geography and astronomy.

• 北きた回かい帰き線せんは北ほく緯い23度ど26分ぷんに位い置ちする。

  The Tropic of Cancer is located at 23 degrees 26 minutes north latitude.

• 南みなみ回かい帰き線せんより南みなみの地ち域いきでは、太たい陽ようが真ま上うえに来くることはない。

  In regions south of the Tropic of Capricorn, the sun never comes directly overhead.

noun

regression line

Mathematical term for the line that best fits a set of data points in regression analysis.

• この散さん布ぷ図ずに回かい帰き線せんを引ひいてください。

  Please draw a regression line on this scatter plot.