Ben and Monica are building number patterns. Ben’s pattern starts with 1 and follows the rule “multiply by 3, then subtract 1”
Monica’s pattern starts with 2 and follows the rule “multiply by 2, then subtract 1”
Select each ordered pair that represents Ben and Monica’s patterns using Ben’s terms as the x-coordinates and Monica’s corresponding terms as the y-coordinates.
(2, 1)
(3, 2)
(5,5)
(9, 14)
(14, 9)

-2 is the right

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional