An equation is said to have a constant of proportionality if 'x' is a multiple of 'y' or 'y' is a multiple of 'x'.
Now, we have to determine an equation with constant of proportionality as '1'.
1. [tex]y = \frac{10}{11}x[/tex]
This equation has constant of proportionality as '[tex]\frac{10}{11}[/tex]'.
2. [tex]y = \frac{7}{8}x[/tex]
This equation has constant of proportionality as '[tex]\frac{7}{8}[/tex]'.
3. [tex]y = \frac{3}{15}x[/tex]
This equation has constant of proportionality as '[tex]\frac{3}{15}[/tex]'.
4. [tex]y = x[/tex]
This equation has constant of proportionality as '1'.
Option D is the correct answer.
Answer:
The answer is D.y=x
Step-by-step explanation:
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