Question

Which of the following graphs is described by the function given below? y = 2x^2 + 8x +3

Answer 1

Answer:

A

Step-by-step explanation:

y = 2x² + 8x + 3

Complete the square:

y = 2(x² + 4x) + 3

y = 2(x² + 4x + 4) + 3 - 2(4)

y = 2(x + 2)² - 5

So the vertex is at (-2, -5).  The graph must be Graph A.

Answer 2

Answer:

The answer is Graph (A.)