NEED HELP BIG TEST

18)
Which table represents a proportional relationship between the x and y values?
A)
x y
−6 7
−3 9
6 3
15 −3
B)
x y
−3 4
−1 6
1 7
3 10
C)
x y
-3 -12
-2 -8
0 0
4 16
D)
x y
−6 −5
−2 1
0 4
8 16
19)
Chris jogged
1
3
of a mile to his friends house in
1
12
of an hour. Compute the unit rate from the complex fraction
1
3
1
12
miles per hour.
A) 2 miles per hour
B) 3 miles per hour
C) 4 miles per hour
D) 6 miles per hour
20)

Find the constant of proportionality for the table and write in the form y = kx.
A) y =
1
15
x
B) y = 10x
C) y = 15x
D) y = 150x