20 which table shows a proportional relationship between x and y? a, b,c, d?

?D

Step-by-step explanation:

If it is a proportional relationship, y/x must be constant

Table 1

y/x = 2/1 = 2

       5/3  ≠ 2

Not proportional

Table 2

y/x = 4/1 =4

 10/2 =5

Not proportional

Table 3

y/x =5/2.5 =2

  6/3 =2  

10/5 =2

15/6 =2.5  

Not proportional

Table 4

Not shown

78.59 is the mean

step-by-step explanation: