Question

How can you determine if the lines are perpendicular?

Answer 1

With given equations or a graph?

Answer 2

Ok

Answer 3

do you determine if they have slopes with opposite values? have the same slope? if the product of their slopes is 1? or if the product of their slopes is -1?

Answer 4

Well, perpendicular is when lines are like this, and have two right angles

Answer 5

Also you can get the equation of BOTH lines and compare them. If the slopes are reciprocals of each other then yes it's perpendicular .

And earlier I meant two or more 90 degree angles

Answer 6

so if they have the same slope??

Answer 7

Same slope, but different y intercepts that means they are parallel

Answer 8

No... it was determine if the product of their slope is -1 :/

Answer 9

I never heard of that