Prove that: The straight line passing through the two points \( (2, -1) \) and \( (6, 3) \) is parallel to the straight line that makes a positive angle of measure \( 45^\circ \) with the positive direction of the X-axis.
Proof:
\( \therefore m_1 = m_2 \)
\( \therefore \) The two straight lines are parallel.
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