How do you find the slope of a line?

- - Pick any small piece of the line.

- - From the left end to the right end of that piece, measure

how much the line rises or drops.

- - Measure how much horizontal distance that piece covers.

- - Divide the amount of rise or drop by the horizontal distance.

That number is the slope of the line.

- - If the line drops as it goes from left to right, then the slope is negative.