Math 1090
Quiz 21
5 March, 2012
Name:
Instructions: Answer the questions below. Make sure to show all work
clearly.
This quiz has two sides.
1. Let
1
y = x2 + 2x + 1
2
(a) (3 points) Write the funtion in vertex form (y = a(x − h)2 + k).
(b) (1 point) Find the vertex of the parabola.
(c) (1 point) Find the axis of symmetry of the parabola.
(d) (1 point) Find the zeros of the parabola.
(e) (1 point) Is the parabola concave up or down? How much is it stretched by?
(f) (3 points) Draw the graph of the parabola.