Question

Determining the Constant of Variation
It is given that y is directly proportional to x.

A 2-column table with 5 rows. Column 1 is labeled x with entries 1, 2, 3, 4, 5. Column 2 is labeled y with entries negative 4, negative 8, negative 12, negative 16, negative 20.

What is the constant of variation?

Answer 1

If y = kx, then k = y/x. For (1, −4): k = −4/1 = −4. So the constant of variation is −4.