Question

max is finding the perimeter of different - sized equilateral triangles. there is a proportional relationship between the side length of the equilateral triangle in feet, x, and the perimeter of the equilateral triangle in feet, y. what is the constant of proportionality? write your answer as a whole number or decimal. feet in perimeter per foot in side length

Explanation:

Step1: Recall the formula for perimeter of equilateral triangle

The perimeter $y$ of an equilateral triangle with side - length $x$ is $y = 3x$. In a proportional relationship $y=kx$, where $k$ is the constant of proportionality.

Step2: Identify the constant of proportionality

Comparing $y = 3x$ with $y=kx$, we can see that $k = 3$.

Answer:

3