Parallel and Perpendicular Lines Review

What is NOT true about parallel lines?

• They have the SAME slope

• They have slopes that are OPPOSITE RECIPROCALS of each other

• They have DIFFERENT y-intercepts

• They NEVER intersect

What IS true about Perpendicular Lines?

• They have the SAME slope

• They have slopes that are OPPOSITE RECIPROCALS of each other

• They MUST have DIFFERENT y intercepts

• They NEVER intersect

Which line is parallel to the line  $y=-2x+4?$  

•  $y=-2x+4$  

•  $y=-\frac{1}{2}x-3$  

•  $y=-2x-5$  

•  $y=\frac{1}{2}x-10$  

Which line is parallel to the line  $y=\frac{2}{3}x-1?$  

•  $y=\frac{2}{3}x$  

•  $y=-\frac{3}{2}x-3$  

•  $y=-2x-5$  

•  $y=\frac{1}{2}x-10$  

Which line is parallel to the line  $2x-5y=-15$  

•  $y=\frac{5}{2}x$  

•  $y=-\frac{3}{2}x-3$  

•  $y=-\frac{2}{5}x-5$  

•  $y=\frac{2}{5}x+4$  

What is the slope of the line  $-3x-2y=10$  

•  $-\frac{3}{2}$  

•  $\frac{2}{3}$  

•  $\frac{3}{2}$  

•  $-\frac{2}{3}$  

What is the slope of the line  $-5y-10x=-3$  

•  $\frac{10}{5}$  

•  $2$  

•  $-2$  

•  $\frac{5}{10}$  

 $4x-12y=-6$  What is the slope of the line

• 3

•  $-\frac{1}{3}$  

• -3
  

•  $\frac{1}{3}$  

Determine if the following lines are parallel, perpendicular, or neither.  $y=\frac{4}{7}x+5\ \ and\ \ y=\frac{7}{4}x-3$  

• Parallel

• Perpendicular
  

• Neither

• IDK

Determine if the following lines are parallel, perpendicular, or neither.  $y=-x+5\ \ and\ \ y=-x-3$  

• Parallel

• Perpendicular
  

• Neither

• These are lines?