Question

Which equation represents a proportional relationship that has a constant of proportionality equal to –10?

y = x - 10
y = x/10
y = -10 x
y = - 10

Answer 1

y = - 10x

Explanation:

The equation representing a proportional relationship is

y = kx ← k is the constant of proportionality

y = - 10x ← is the only equation in this form

Thus the equation is y = - 10x with k = - 10