I just dont get this stuff, Parallel and perpendicular line

[dragoonadept]

-10x+8y=3;(15,12)
I'm completely lost. I find myself taking the odd numbered answers out of the back of the book. But the test will stop me, I really need help.

 

[stapel]

I'm sorry, but I can't tell what you're supposed to be doing with the listed line and point. Your subject line refers to parallel and perpendicular lines, but how does this relate?

Please reply with the complete instructions. Thank you.

Eliz.