Question

Which table shows a proportional relationship between x and y?

x 2 3 5 6
y 3 4 7 9

x 1 5 8 10
y 15 75 120 150

x 4 6 8 10
y 6 8 10 12

x 3 9 10 15
y 1 3 4 5

Can someone help i suck at math

Answer 1

Table 3

Explanation:

In a proportional relationship there must be a constant rate of change.

The first table:

6-5 / 9-7 = 1/2

5-3 / 7-4 = 2/3

These are not equal so it is not proportional.

The second table:

10-8 / 150-120 =2/30

8-5 / 120-75 = 3/45

These are not equal so it is not proportional

The third table:

10-8 / 12-10 =2/2 = 1

8-6 / 10-8 =2/2 = 1

These are equal so this table is proportional.