Which describes the slope of this line?

-4 - 2 0 2 4

A. Negative slope

B. Zero slope

C. Positive slope

D. Undefined slope

A zero slope because the gradient is zero

That slope is a B. Zero Slope.

You know this because you measure slopes through the gradient of a line.

The formula for this is:

Rise/Run

Rise is how far it moves up the y axis, and run is how far it goes through the x axis.

The rise of a straight line is 0, and the run of the straight line is infinite.

So, you can say that because anything divided by zero is zero, the slope of a horizontal straight line is 0!