Question

Explain why vertical lines are a special case in the definition of parallel lines.

Answer 1

Answer:

A vertical line has an infinite or undefined slope since the denominator is zero.

Step-by-step explanation:

Parallel lines by definition refers to lines that never intersect or meet since they have identical slopes. The slope of line is defined as;

(change in y)/(change in x)

For a vertical line, the y values are changing while the x values remain constant. The slope of this line will thus have a zero value in the denominator implying that its slope will not defined or will be infinity.

Answer 2

Answer:

A vertical line has an infinite or undefined slope since the denominator is zero.

Step-by-step explanation: