Answer:
The correct option is B.
Step-by-step explanation:
If a line passing through two points, then the slope of a line

It is given that the in Relationship A, the line passing through the points (5, 2) and (10, 4). Rate of change of Relationship A is,

In option A, the Rate of change of Relationship B is,

In option B, the Rate of change of Relationship B is,

In option C, the Rate of change of Relationship B is,

In option D, the Rate of change of Relationship B is,

Only in option B, the Relationship B has a lesser rate than Relationship A. Therefore option B is correct.