Question

Use the parabola tool to graph the quadratic function.

f(x)=2x^2+4x−16



Graph the parabola by first plotting its vertex and then plotting a second point on the parabola.

Answer 1

f(x) = 2x² + 4x - 16

= 2(x² + 2x) - 16

= 2(x² + 2(x)(1) + 1² - 1²) - 16

= 2(x + 1)² - 2 - 16

= 2(x + 1)² - 18

Vertex: (-1, -18) minimum

Second point can be the y-intercept:

(0, -16)

It should be a concave up