Which one do I pick .

Triangle abc is reflected over the line y=x triangle abc has points (-6,-,-1) and (-5,-6) what is the c coordinate

If given an equation of a line such as -1/2x+6 how would you create an equation of a line parallel and perpendicula to this line that goes through another point such as (4,10)

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?