**Interactive Parabola. Click and drag focus & Directrix to see equation and formula adjust


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Vertical Line

Traits and Charactristics

Vertical lines are lines that go straight up and down.

    other traits of vertical lines

  • The equation of a vertical line always takes the form x = k
    • where k is any number and k is also the x-intercept. For instance in the graph below, the vertical line has the equation x = 2.5. As you can see in the picture below, the line goes straight up and down at x = 2.5
  • The equation of a vertical line does NOT have a y-intercept since a vertical line never crosses the y-axis.
  • The slope of a vertical line is undefined.
  • Vertical lines help determine if a relation is a function in math.

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