Quadratics in Contexta. The Pendulumb. Fireworksc. Parabolas in the Real Worldd. Changing Perimeter and Area

The PendulumWatch the first minute and a half

of this video:◦http://www.youtube.com/watch?v=rd

SgqHuI-mwDid the pendulum learn about

quadratics in high school too?

FireworksWatch some of this video:

◦Fireworks are timed with the music.◦http://www.youtube.com/watch?v=d

yaNPsHWDes&feature=relatedHow do fireworks know anything

about quadratics?

Fireworks

Parabolas in the Real WorldLocate the parabola in each

pictureThen note the differences in size

and shape of each.

1 – Water Splash 1 - Fountain

3 – Satellite 4 – Satellite

5 - Cone 6 – Basketball Bounce

7 - Branch 8 – Beach

9 – Tyne Bridge 10 – Bridges

11 – Bridge 12 – San Francisco

Changing Perimeter and Area

1 ft

1 ft

1x ft

1x ft

What happens to the area and perimeter of the square when you multiply each dimension by a scale factor of x?

Changing Perimeter and Area1 ft

1 ft1x ft

1x ft

What happens to the area and perimeter of the square when you multiply each dimension by a scale factor of x?

Fill out a table and graph your results.X Perimet

er12345

X Area12345

x

y

Changing Perimeter and Area1 ft

1 ft1x ft

1x ft

What happens to the area and perimeter of the square when you multiply each dimension by a scale factor of x?

Fill out a table and graph your results.X Perimet

er1 42 83 124 165 20

X Area1 12 23 94 165 25

x

y

Changing Perimeter and Area

1 ft

1 ft

1x ft

1x ft

What does the area of a square have to do with quadratic functions?

x

y