8. what is the constant of proportionality in the equation y = -0.41x?

Explanation:

Step1: Recall the form of a proportional - relationship equation

The equation for a proportional relationship is $y = kx$, where $k$ is the constant of proportionality.

Step2: Identify the constant in the given equation

In the equation $y=-0.41x$, comparing it with $y = kx$, we can see that $k=-0.41$.

Answer:

$-0.41$