What is the slope of the line.

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)

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals