Question

Which equation has a constant of proportionality equal to 1? A. y=10/11x B. y= 7/8x C. y= 3/15x D. y=x

Answer 1

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. $y = \frac{10}{11}x$

This equation has constant of proportionality as '$\frac{10}{11}$'.

2. $y = \frac{7}{8}x$

This equation has constant of proportionality as '$\frac{7}{8}$'.

3. $y = \frac{3}{15}x$

This equation has constant of proportionality as '$\frac{3}{15}$'.

4. $y = x$

This equation has constant of proportionality as '1'.

Option D is the correct  answer.