Question

Use the parabola tool to graph the quadratic function f(1) = 2x^2+16x+30Graph the parabola by first plotting its vertex and then plotting a second point on the parabola.

Answer 1

vertex(-4,-2)

focus(-4,-15/8)

Axis of symmetry,x=-4

directrix, y=-17/8

x y

-6 6

-5 0

-4 -2

-3 0

-2 6