Answer:
ABC
Step-by-step explanation:
Answer:
(a) 
(b) 
Step-by-step explanation:
It is given that 
(a) We have given equation 



(b) 



Answer:
C
Step-by-step explanation:
The equation of direct variation is y=kx.
K is the constant of proportionality, which is in this case is -3.
y=-3x