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Answer:
- the contant of proportionality is 2
- y = 3x
Explanation:
1. Match the given equation (y = 2x) to the pattern ...
y = kx . . . . . k is the constant of proportionality
Hopefully, you can see that k corresponds to 2. That is, the coefficient of x is the constant of proportionality. It is 2.
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2. Since you're studying proportions, it is useful to look at the ratio of the y-value to the x-value. In each case, it is 6/2 = 9/3 = 15/5 = 3. Then the graph shows the variables are proportional, with a constant of proportionality of 3.
y = 3x