Find the vertex for the function below and identify if it is a maximum or a minimum. * y=-2x2 +8

Can someone me out here number 4 plz

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem

What is the equation of the line that is parallel to the line with the equation y= -3/4x +1 and passes through the point (12,-12)