Answer:
7m = 50.75 models .
Option (D) is correct .
Explanation:
As given in the question be as follow .
The equation 5m = 36.25 models a constant rate situation.
Now find out for 1m.

m = 7.25
thus
7m = 7 × 7.25
= 50.75 models
Therefore 7m = 50.75 models .
Option (D) is correct .