Question

Determine whether the graph of the pair of equations is parallel, perpendicular, or neither.
y=-4x+1
4y=x+3
Select one:
a. parallel
b. perpendicular
c. neither

Answer 1

$y=mx+b$
$m_{1} =-4$
$m_{2}=\frac{1}{4}$
$m_1=\frac{-1}{m_1}=\frac{-1}{\frac{1}{4}}=-4$
Therefore the lines are perpendicular.