# How do you graph f(x)= 2x^2+8x+7?

Sep 8, 2015

Refer explanation section

#### Explanation:

find the vertex

$x = \frac{- b}{2 a} = \frac{- 8}{2 \times 2} = - 2$
$x : y$
$- 5 : 17$
$- 4 : 7$
$- 3 : 1$
$- 2 : - 1$
$- 1 : 1$
$0 : 7$
$1 : 17$

Take a few values on either side of x, plot the points and draw a smooth curve. graph{2x^2 +8x+7 [-22.82, 22.81, -11.4, 11.4]}