Question

The graph of a proportional relationship passes through (9,18) and (1,y). Find y.

Answer 1

Your answer for y would be 2.
18/9=2.

Answer 2

Answer:

$y=2$

Step-by-step explanation:

The given points are $(9,18)$ and $(1,y)$.

Notice that the relation between coordinates is: the vertical coordinate is double the horizontal one, that is, $2(9)=18$.

So, we need to use the same proportion to find $y$

$y=2(1)=2$

Therefore, the answer is 2.