Answer:
non- proportional
Step-by-step explanation:
x and y are proportional if we can write y as k times x, so:
y = kx
Where k is the constant of proportionality.
Since y=0.6x + 3 have an additional sum of a constant after 0.6x, we can say that y = 0.6x + 3 is a non-proportional relationship.