Question

which of these is a ratio table?

first table:
a | b
1 | 5
2 | 6
3 | 7

second table:
a | b
1 | 4
2 | 5
3 | 7

third table:
a | b
1 | 1
2 | 4
3 | 9

fourth table:
a | b
1 | 2
2 | 4
3 | 6

Explanation:

Answer:

1 & 2 & 3 & 5 & 6 & 7 \\
1 & 2 & 3 & 4 & 5 & 7 \\
1 & 2 & 3 & 1 & 4 & 9 \\
1 & 2 & 3 & 2 & 4 & 6