Can somebody please check my work?

Question

mokeira · Answer

which one

anonymous · Answer

attachment

anonymous · Answer

Triangle ABC is similar to triangle DEF. Using the image below, prove that parallel lines have the same slope. You must show all of your work to receive credit.

anonymous · Answer

slope of AB=-6/0
slope of DE=-3/0
***both slopes are undefined 

slope of segment AC=1 
slope of segment DF=1
proof: Y2-Y1/X2-X1
           2-8/-11-(-5)
          -6/-11+5
          -6/-6
          =1
***AC=slope of DF since AC is parallel to DF

slope of BC=0/6
slope of EF=0/3
***both slopes are undefined

anonymous · Answer

Your good.

anonymous · Answer

Yes, but the last one, they are =0 , not undefined

anonymous · Answer

but isn't the 0 undefined in graphing since there is no slope? @OOOPS

anonymous · Answer

it's NOT no slope, it is slope =0 |dw:1407252787328:dw|

anonymous · Answer

Ohhh ok. tysm!!