垂直線方程 定義
The equation of a vertical line is x = k, where a represents the x-intercept. The graph below provides an example of the equation of a vertical line.
特性
The equation of a vertical line does not have a y-intecept since a vertical line never crosses the y-axis. If it runs directly through the y-axis (x = 0) then it technically intersects the y-axis and has many y-intercepts.
The slope of a vertical line is undefined because the denominator of the slope (the change in ΔX) is zero.
垂直線有助於確定關係是否是數學中的函數。
垂直線的方程總是採用 x = k 的形式，其中 k 是任意數，k 也是 x 截距。
來源
“Vertical Line.” Math Warehouse, www.mathwarehouse.com/algebra/linear_equation/vertical-line.php.
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