Question

Make sure it is the correct answer!!!!!!!!!

Answer 1

For this case we have by definition, if "y" varies directly with "x", then it is true that:

$y = kx$

Where:

k: It is the constant of proportionality

We have the following equation:

$y = 2.5x$

So, as mentioned above we have to:

$k = 2.5$

Answer:

$k = 2.5$

Option B