Answer
neither
Work Step by Step
Step 1. Find the slope of the first line $6x-3y=10$ to get $m_1=2$
Step 2. Find the slope of the 2nd line $2x+y=-8$ to get $m_2=-2$
Step 3. Since $m1\ne m_2$ and $m_1m_2\ne -1$, they are neither parallel nor perpendicular.
