Question

Which ordered pair would form a proportional relationship with the point graphed below?

On a coordinate plane, point (negative 20, 40) is plotted.
(–40, 20)
(–10, –20)
(15, –30)
(5, –15)

Answer 1

A proportional relationship with (-20, 40) has constant k = 40/(-20) = -2, so y = -2x. Check the choices:
- (15, -30): -2·15 = -30, so it matches.

Answer: (15, -30)