determine whether the given linear equation are parallel, perpendicular or neither
y=-2x-9
y=2x+12

Question

determine whether the given linear equation are parallel, perpendicular or neither 
y=-2x-9
y=2x+12

tamtoan · Answer

you can check definition of slope of perpendicular lines, then you can figure out easily

asnaseer · Answer

Can you tell me what the slopes of these lines are?

anonymous · Answer

i dont know where to start im lost

tamtoan · Answer

can you try to read and understand this ? http://www.purplemath.com/modules/slope2.htm

asnaseer · Answer

This site might be if help to you: http://www.mathsisfun.com/equation_of_line.html

anonymous · Answer

yes thank you

asnaseer · Answer

Once you have understood what slope is, then you need to know:

1) What is the relationship between the slopes of two lines that are parallel to one another
2) What is the relationship between the slopes of two lines that are perpendicular to one another

You should then be able to answer this question.

Let me know if you need any further help.

anonymous · Answer

what if they cross at the some point