Which set of ordered pairs represents a function?
{(-1,-6), (-1, -2),(5, -1), (7, -2)}
{(5,-9), (-2, - 7),(5,4), (3, 7)}
{(4,-4), (-4,-4), (-7, -2), (-6,6)}
{(-4,7), (-4, - 7),(-3,6), (-6, -6)}

Trigonometry hellllllpppppppp asap

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

Ingredient c: 1/4 cup for 2/3 serving or ingredient d: 1/3 cup for 3/4 serving which unit rate is smaller