Answer:
A proportional relationship is something like:
y = k*x
where k is the constant of proportionality.
Notice that in these relationships we will always have the pair (0, 0)
because if x = 0:
y = k*0 = 0
Then we always have x= 0, y = 0.
Notice that in the first two tables we have the points:
(2, 0) in the first one
(0, 1) in the second one.
then neither of these can be a proportional relationship.
The only option left is the third one.
To graph the relationship, we can just graph the four points in the table.
Then draw a line that passes through all the points, like in the image below.
And this line is written as:
y = 3*x
such that:
y(1) = 3*1 = 3 -----> (1, 3)
y(2) = 3*2 = 6 -----> (2, 6)
y(3) = 3*3 = 9 ------> (3, 9)
