Help! Please
1. Consider the triangular region in the plane given by the triangle (1, 6), (6, −1), and (1, −4).
Sketch the region, and write a system of inequalities to describe the region bounded by the triangle.
2. Consider the quadrilateral with vertices (−2, −1), (2, 2), (5, −2), and (1, −5).
What is the equation of the perpendicular bisector of the side of the quadrilateral that lies in the fourth quadrant?
3. Line contains points ( − 4, 2) and (−2, 9). Line contains points (, −1) and (−1, 1).
A. Find the value of if the lines are parallel.
B. Find the value(s) of if the lines are perpendicular.