31.) state the slope of the line shown below.

a.) 1

b.) –2

c.) 0

d.) undefined

The answer is undefined

The slope of a line can be positive, negative, zero, or undefined. A horizontal line has slope zero since it does not rise vertically (i.e. y1 − y2 = 0), while a vertical line has undefined slope since it does not run horizontally (i.e. x1 − x2 = 0).