Given a plane, how many unique pairs of parallel lines can be drawn on the plane? a. zero b. one c. two d. infinitely many

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

The variable in a relation who’s value depends on the value of the independent variable is called what?

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1