Option C is the correct values of the relationship between the number of cakes the baker makes and the number of bags of flour uses.
Solution:
Option A: Ratio of cakes baked to bags of flour used

Here the ratios are not same.
So, this option is not true.
Option B: Ratio of cakes baked to bags of flour used

Here the ratios are same.
So, this option is true.
Option C: Ratio of cakes baked to bags of flour used

Here the ratios are not same.
So, this option is not true.
Option D: In this table cakes baked is 6 and the bags of flour is 18.
But a baker made 18 cakes using 6 bags of flour.
So, this option is not true.
Hence option C is the correct values of relationship between the number of cakes the baker makes and the number of bags of flour uses.