Find the slope of the line passing through the pair of points below. Assume that all variables represent positive real numbers. Then indicate whether the line through the points rises, falls, is horizontal, or is vertical.

(a,0) (b,0)

Select the correct choice below and fill in the answer box within your choice.

A. The slope is:

.

B.The slope is undefined

Which of the following describes the line passing through the given points?

Vertical

Falls from left to right

Horizontal

Rises from left to right