In Exercises 1 and 2, determine which of the lines, if any, are parallel. Explain.
1. Line a passes through (-1, 1) and (1, 3).
Line b passes through (3, 4) and (0, 2).
Line c passes through (0, 1) and (3, 3).30
2. Line a passes through (-6, 3) and (0, 6).
Line b passes through (-5, 0) and (7, 6).
Line c passes through (2, 1) and (10, -3).