Please!? Can somebody provide me with a couple formulas? (Geometry)

Question

anonymous · Answer

Proving parallel lines, proving perpendicular lines

anonymous · Answer

proving positive slope, proving negative slope

anonymous · Answer

(slope intercept form)

anonymous · Answer

please help i can't get a straightforward answer from google or my text book

jdoe0001 · Answer

hmm got any specifics?

anonymous · Answer

I am supplied only coordinates

jdoe0001 · Answer

ok... and ...

anonymous · Answer

I thought there were particular formulas for each? (knowing that its based off of coordinates, not angles or something)

anonymous · Answer

Am I mistaken? Or do you think I'm leaving out important details?

jdoe0001 · Answer

hmmm well...   I'd say there are particular "theorems" for them, yes, no formulas per se

anonymous · Answer

oh sorry that's totally what I meant

jdoe0001 · Answer

hmmm well, yes, there are ... but  some may nor may not apply depending on the specifics

anonymous · Answer

what specifics do i need to supply?

jdoe0001 · Answer

like what are you being asked?

anonymous · Answer

I'm not being asked anything, my assignment is rather complicated. That's why I didn't post it in the first place. For the first bit, I need to prove that the line connecting 1,2 and 27,15 is a positive slope,