4
advanced-math

Find the vertex of y=x2+2y = x^2 + 2.

A

(0,2)(0, 2)

B

(2,0)(2, 0)

C

(0,0)(0, 0)

D

(2,0)(-2, 0)

Correct Answer: A

Choice A is the correct answer. This equation is in the form y=ax2+cy = ax^2 + c, where b=0b=0.

  1. Calculate x-coordinate: x=b/2a=0/2(1)=0x = -b/2a = -0/2(1) = 0.
  2. Calculate y-coordinate: y=02+2=2y = 0^2 + 2 = 2.

Alternatively, recognize this as a vertical shift of the parent function y=x2y=x^2 up by 2 units. The vertex moves from (0,0)(0,0) to (0,2)(0,2).

Choice B is incorrect because it swaps x and y. Choice C is incorrect because it ignores the constant term. Choice D is incorrect because it confuses horizontal and vertical shifts.