Hi there! :)
Answer:
Find the constant of proportionality using
rise ( y value) / run ( x value):
Therefore:
8 / 1 = 8 = constant of proportionality
We can go ahead and check our work as well:
16 / 2 = 8
24 / 3 = 8
32 / 4 = 8
Therefore, 8 is the correct constant of proportionality.