Question

What are the vertex, axis of symmetry, maximum or minimum value, domain, and range of the function `y=x^(2)-2x-15`?

Answer 1

Coordinate of vertex:
x = -b/2a = 2 /2 = 1
y = f(1) = -16

Axis of symmetry: x = 1
Min value of y: -16
Domain of x: -infinity to +infinity
Range: - 16 to +infinity.