How do you find the vertex and axis of symmetry, and then graph the parabola given by: # y= x^2+ 4x + 3#?
Axis of symmetry x= -2
First write the equation by completing the square for x,
In this form, the vertex is given by x+2=0 and and y+1=0, that is (-2, -1). Axis of symmetry is given by the equation x= -2
The graph would look like as follows: