How can you use the value of a to predict the shape of ƒ (x) = ax² without plotting points? (100 points plz help)

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

The focus of parabola is (-4, -5), and its directrix is y= -1. fill in the missing terms and signs in parabolas equation in standard form

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y