Explanation:
y = (x - 1)(x + 3)
Find y intercept:
y = (0 - 1)(0 + 3) ⇒ y = -3
coordinates: (0, -3)
Find x intercept:
(x - 1)(x + 3) = 0 ⇒ x = 1, x = -3
coordinates of x intercept: (1, 0), (-3, 0)
Vertex: x = -b/2a = -2/2(1) = -1
y = (-1 -1)(-1 +3) = -4
coordinates: (-1, -4)
