perpendicular to the graph of y = 2x – 4

Question

This topic is about geometry i want to learn how to find perpendicular lines 2 sts of perpendicular lines. what are the steps how to find them and all that.

Answer 1

Two lines are Perpendicular if they meet at a right angle (90°).

 

How do you know if two lines are perpendicular?

When you multiply their slopes, you get -1

 

 
 
These two lines are perpendicular:

Line y = 2x + 1
Slope = 2

Line y = -0.5x + 4
Slope = -0.5

 

Multiple the slopes and you will get a negative 1.

 

When you enter these equations on a graphing calc. or draw them on paper you will see the 90 degree angle