Determine whether the lines are parallel, perpendicular, or neither.
y=2x+ 4/3 and y= 3/4 -2x
(4/3 and 3/4 are fractions)
$\displaystyle y=\frac{4}{3} + 2x ,\qquad y=\frac{3}{4} - 2x$
Firstly look at the gradient $\displaystyle -2$ and $\displaystyle 2$
Do they multiply togeather to make -1 ?
If not they are not perpendicular.
Are thier gradients the same?
If not, then they are not parallel