# What is the axis of symmetry for the graph y = x^2+ 4x + 3?

Mar 30, 2016

$x = - 2$

#### Explanation:

From standard form of $y = a {x}^{2} + b x + c$

The axis of symmetry is $\left(- \frac{1}{2}\right) \times \frac{b}{a}$

In your case $a = 1$ so we are left with

$\left(- \frac{1}{2}\right) \times 4 = - 2$