1. Constant of Proportionality Pg. 40 & 41 RS
Answer: C

2. The constant of proportionality is a constant ratio (unit rate) in any proportional relationship.
We use the letter k to represent the constant of proportionality.
Equations:
y = kx or k = y x

3. We can find the constant of proportionality from a table of values, equation and a graph.
In a table, simplify any one of the ratios (since we already know that the table is proportional).
Chaperones 1 2 3 4 5
Students 12 24 36 48 60

4. In a graph, choose a point (x, y) to find and simplify the ratio y/x.
(2,24)
Chaperones
Students 6 12 18 24 30 36 42 48 54 60

5. Examples: Constant of Proportionality Pg. 40 & 41 LS
Answer: C

6. Find the constant of proportionality:
Apples (lbs) 2
2.5 3
3.5 4
Cost ($)
3.96
4.95
5.94
6.93
7.92
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7. Find the constant of proportionality:X Y 3
4.5 4 6 5
7.5 8 12 9
13.5
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8. Find the constant of proportionality:X Y 2
1.5 5
3.75 10
7.5 12 9
Answer: k = 0.75

9. In an equation, write the equation in the form y = kx. Examples:
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Click
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10. Find the constant of proportionality:

11. Find the constant of proportionality: 2 4 6 8 10 12 14 16 18 20
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12. Find the constant of proportionality: 4 8 12 16 20 24 28 32 36 40
Answer: k = 8

13. Find the constant of proportionality:
0.5 1
1.5 2
2.5 3
3.5 4
4.5 5
Answer: k = 1/3

14. Video
Answer: C
Constant of Proportionality