Problem
Determine whether the pair of lines is parallel, perpendicular, or neither. \[ \begin{array}{l} 9 x+3 y=12 \\ 12 x+4 y=19 \end{array} \] A. Parallel B. Perpendicular C. Neither
Solution
Step 1 ：\(\frac{9x}{3}\) = \(-1\) * \(y\) + \(4\)
Step 2 ：\(\frac{12x}{3}\) = \(-1\) * \(y\) + \(4.75\)
Step 3 ：C. Neither
