From the above figure the values of stopping potentials for `M_(1)` and `M_(2)` for a frequency `v_(3)( gt v_(02))` of the incident radiatioins are `V_(1)` and `V_(2)` respectively. Then the slope of the line is equal to
A. `(V_(2)-V_(1))/(v_(02)-v_(01))`
B. `(V_(1)-V_(2))/(v_(02)-v_(01))`
C. `V_(2)/(v_(02)-v_(01))`
D. `V_(1)/(v_(02)-v_(01))`