Post on 16-Dec-2015
Warm up1. Write the rule for translating left 4 units
and up 6 units.2. Write the rule for reflecting over the x-
axis.3. Write the rule for reflecting over the line
y=x.4. Write the rule for reflecting over the y-
axis.5. Write the rule for reflecting over the line y=-x.
Warmup The table below shows the number of people
per 100,000 that were unemployed in the state of Georgia the selected years. a) Find the regression equation appropriate for this data set. Round values to two decimal places.
Let x = 0 correspond to 1960.
Year 2000
2003 2008 2010 2011 2012
Unemployed
559 483 412 322 258 240
Y=-25.95x + 569
Rotations
A rotation is a ________ around a center.
The _______________ from the center to any point on the shape stays the ___________.
turn
distancesame
Rotate 90° counterclockwiseabout the origin
E
FG
Get the points of where they should be….then graph them!
EF
G
90°CW
180°
CWE
FG
270°
CW
Rotate 90° counterclockwiseabout the origin
Change the sign of y and switch the order
E 7,2 E'( -2 , -7)
F 2 , 3 F' ( -3 , 2 )
G 5,0 G '( 0 , 5 )
EF
G
Rotate 270 Counterclockwiseabout the Origin
(Same as 90 Clockwise)
Change the sign of x and switch the order
x,y y, x
Rotate 270° Counterclockwiseabout the origin
A
B
C
Rotate 270° Counterclockwiseabout the origin
Get the points of where they should be….then graph them!
A’
B’
C’
90°CW
Rotate 270° Counterclockwiseabout the origin
A 2, 2 A'( 2 , -2 )
B 6, 8 B'( 8 , -6)
C 8, 2 C '( 2 , -8 )
A
B
C
Rotate 180° about the origin
Q
R
S
Get the points of where they should be….then graph them!
90°CW
QR
S180
°CW