Aparabola has a vertex at (–5, 0) and passes through the point (–3, 1). which of the following is the equation of this parabola in the form

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.