Question

Find the equation of the axis of symmetry and the coordinates of the vertex of the graph of the function y = 2x2 + 4x –3.

x = –2; vertex: (–2, –3)
x = –1; vertex: (–1, –7)
x = 1; vertex: (1, 3)
x = –1; vertex: (–1, –5)

Answer 1

Answer: x = –1; vertex: (–1, –5)

Explanation:

Answer 2

A graphing calculator shows the 4th selection to be appropriate.