Question

Can someone please help I can’t figure it out I’m so confused

Answer 1

Since y=x has the same coefficient (of 1), this equation has a 1:1 ratio (another word for "it has the proportionality of 1).

If it's wrong, I'm sorry... Khan Academy is a little annoying...

Answer 2

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

$y=\frac{7}{8}x \rightarrow \frac{7}{8}$

$y = \frac{3}{15} \rightarrow \frac{1}{5}$

$y = x \rightarrow 1$

From the information given above, D is the answer which has a constant proportionality equal to 1.