8. Find the slope of the line that passes through (5, -4) and (-2, -5).

The slope formula is:  m  =  (y2 - y1) / (x2 - x1).

Choose either point to be the first point; I am choosing (x1, y1) = (5, -4) and (x2, y2) = (-2, -5).

This means that x1 = 5, y1 = -4, x2 = -2, and y2 = -5.

Putting these values into the formula:  m  =  (-5 - -4) /(-2 - 5)  =  (-5 + 4) / (-2 - 5)  =  -1 / -7  =  1/7.

If you are in algebra class, you should memorize this formula.