Question

Which of the following is a point on the graph as described by the function y=(2x+1)2−4
𝑦
=
(
2
𝑥
+
1
)
2
−
4
?(1 point)

Answer 1

The vertex occurs when 2x+1 = 0 → x = −1/2, and then y = (0)^2 − 4 = −4. So (−1/2, −4) is on the graph.

(Also e.g. x=0 gives y=(1)^2−4=−3, so (0,−3) is on the graph.)