Answer:
y=3x
The turtle walks away from the rock at a constant rate.
Step-by-step explanation:
A proportional relationship is one in which the two variables vary directly with each other and can be represented by the equation:
y = kx, where k is the constant of proportionality.
Also, a proportional relationship has a constant rate which is the ratio of the two variables.
A) The equation y = 3x is a proportional relationship because it is in the form y = kx, k =3
B) After 4 minutes, the turtle has walked 12 feet away from the rock.
We cant say that this is a proportional relationship because it may or may not be proportional.
C) The turtle walks for a bit, then stops for a minute before walking again.
It is not proportional
D) The turtle walks away from the rock at a constant rate
This is a proportional relationship because it has a constant rate