Question

Determine if the slope of each line is positive, negative, or zero.

Answer 1

Green: Positive

Red: Zero

Black: Negative

Blue: Undefined

Step-by-step explanation:

Green: as x increases, y increases so there is a positive slope

Red: A horizontal line has a slope of zero because slope is rise divided by run, rise is zero, zero divided by anything is zero.

Black: as x increases, y decreases so there is a negative slope.

Blue: a vertical line has a run of zero and slope is rise divided by run but we cannot divide by zero so it is undefined.

Answer 2

The slope of green line is positive, the black line has negative slope, and the red line has zero slope.