Question

Do these equations represent direct variation. If so please identify their constant of variation.

Answer 1

Yes, these both are direct relationships and can be written like $y = kx$, where k is the constant of variation.

For the first equation, k = 10. For the second equation, k = -4/3. You find it by rearranging the equation into the form $y=kx$, and you use the coefficient of x for k.

Answer 2

Yes they both are direct relationships