Post on 29-Dec-2015
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 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?
Fill out a table and graph your results.
X Perimeter
1
2
3
4
5
X Area
1
2
3
4
5
x
y
Changing Perimeter and Area1 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?
Fill out a table and graph your results.
X Perimeter
1 4
2 8
3 12
4 16
5 20
X Area
1 1
2 2
3 9
4 16
5 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