Answer:
A vertical Iine (x = a ) has an undefined slope.
Step-by-step explanation:
A vertical line has undefined slope because all points the line have the same x-coordinate.
Since any two points on a vertical line have the same x-coordinate, the slope cannot be calculated as a finite number. If you try to solve for the slope using the slope formula, m = (y2 - y1)/(x2 - x1), it will result in an undefined quotient because division by zero is an undefined operation.
Vertical lines are symbolically represented by the equation, x = a where a is the x-intercept. More importantly, vertical lines are not functions; they do not pass the vertical line test because the same input value (or x-coordinate) corresponds to more than one output (y-coordinates).
