Middle angles are vertical , so the are congruent,
so third angle in triangles will be also congruent (angle near crossed side)
so ASA postulate
1) The y- axis is where x = 0, so the line "y = -1/2x - 3" will cross the y-axis when x = 0. You plug in "x = 0" into the equation, and get y = 0 -3, so y = -3. That means the line " y = -1/2x - 3" will cross the y-axis ar (0, -3)
2) If there are 2 parallel lines, then there is no solution, because the definition of parallel lines is, " 2 lines in the same plane, that never meet." That makes the solution inconsistent.
Answer:
y = 4/p−x/2p
(4 over p is a fraction as well as X over 2p)