Question

a new smart phone application is available for download the number y of downloads can be modeled by the function y-6.3x^2+3000

Answer 1

Graph the parabola using the direction, vertex, focus, and axis of symmetry.

Direction: Opens Up

Vertex:

(

0

,

−

3000

)

Focus:

(

0

,

−

2999.9

¯¯¯¯¯¯¯¯¯¯¯¯

603174

)

Axis of Symmetry:

x

=

0

Directrix:

y

=

−

3000.0

¯¯¯¯¯¯¯¯¯¯¯¯

396825

x

y

−

2

−

2974.8

−

1

−

2993.7

0

−

3000

1

−

2993.7

2

−

2974.8

Explanation: