Scaled Copies/Drawings
Scale Factor
Proportional Tables
Constant of Proportionality
100
Which images are scaled copies of the original? 
C and D
100
Is the scale factor for these scaled copies equal to 1, less than 1, or greater than 1?
Greater than 1, image B is larger than image A.
100
How many people can 3 cups of rice feed?
9 people
100
What variable (letter) is used to represent Constant of Proportionality?
k
200
Why are A, B, and E not scaled copies? 
A- It is stretched taller but not wider
B- It is stretched wider but not taller
E- It is stretched diagonally and tilts
200
Is the scale factor equal to 1, less than 1, or greater than 1 in these scaled copies? 
Less than 1, image B is smaller than image A.
200
Are the cups of rice proportional to the number of people fed?
Yes, as the rice increases the number of people that can be fed also increases at a constant rate.
200
What is the formula to find your Constant of Proportionality?
y/x
y divided by x
300
These are scaled copies. Which side corresponds to line AB in triangle DEF?
Line DE
300
Is the scale factor equal to 1, less than 1, or greater than 1? 
equal to 1, the images are the same size
300
How many people can be fed with 10 cups of rice? 
30 people
300
x 2 4 7
y 12 24 42
What is the constant of proportionality?
6
400
Are these scaled copies? 
Yes, B is twice the size of A.
400
What is the scale factor going from image A to B?
1, they are the same size.
400
How many cups of rice do you need to feed 45 people? 
15 cups of rice
400
x 4 6 10
y 6 9 15
What is the Constant of Proportionality for this table?
3/2 or 1.5
500
Are these scaled copies? 
Yes, each side in DEF is 4 times as long as the sides in ABC.
500
What is the scale factor going from image A to B?
3, image A is 2 units tall and 2 units wide while image B is 6 units tall and 6 units wide. You multiply the lengths by 3 to get from A to B.
500
How many people can you feed with 1 cup of rice? 
3 people can be fed with each cup of rice.
500
What is the constant of proportionality?
x 12 20 28
y 3 5 7
1/4 or 0.25