Isaac keeps track of the miles per gallon his car gets per week. he has accumulated the following data:

(1, 24), (2, 24.48), (3, 24.97), (4, 25.47)

what is the common difference or ratio?

the common difference is 0.48.
the common difference is 0.50.
the common ratio is 0.98.
the common ratio is 1.02.