Question

What is the vertex of the parabola whose equation is y = (x- 1)2 + 3?
(-1, -3)
(-1, 3)
(1, 3)
(1, -3)

Answer 1

the vertex has x coordinate 1 ( from (x-1)
at x = 1 y = (1-1)^2 + 3 = 3

no 3 is correct

Answer 2

This is the standard form of a quadratic function, f(x) = a(x-h)^2 + k
Where (h,k) is the vertex

Answer 3

In this case, y = (x-1)^2 + 3
(1,3) is the vertex.

Just some reminder:
If your equation was y = (x + 1)^2 + 3 (Notice the plus sign)
(-1,3) would be the vertex.