Which of the following words describe the slope of a vertical line?

Question

A.negative

B. positive

C. undefined

D. zero

Answer 1

First lets give a quick definition to what slope is. Slope is rise over run, rise / run. In other words, slope is the change in y over the change in x.

The slope formula is: m = (Y₂-Y₁ )÷(X₂-X₁)

A vertical slope means that the change in X or (X₂-X₁) is 0 which break an important rule in mathematics because you can never have 0 in the denominator of a fraction. That is why a vertical slope is undefined.

Answer 2

A vertical line has no or an undefined slope.