Answer:
A,C,F
Step-by-step explanation:
y proportional to x means y = kx
A 0*5= 0
4*5 =20
5*5 = 25 Yes
B This is not We would have to add to get an output of 9 with an input of 0
C 0*4= 0
4*4 =16
5*4 = 20 Yes
A 0*5= 0
1*5 =5
5*5 = 25 not 1 NO
E 0*6= 0
3*6 =18
5*6 = 30 not 35 No
D 0*2= 0
2.5*2 =5
6*2 = 12 Yes
