Answer:
a. -3/4 b. 4/3
Explanation:
a.
To find the slope of a line, use the equation (y2 - y1) / (x2 - x1).
Plugging the values into the equation, you get (-5 - -8) / (0 - 4) = 3/-4
Thus, the slope of line p is -3/4.
b.
A perpendicular line is just one with a slope that is the opposite reciprocal of the original line. You find the slope value by flipping the fraction and adding the opposite sign (if it was originally positive, the perpendicular line should be negative, and vice versa).
So, the slope of line r is 4/3.