Answer:
yes ,what's the question
and if the question is why
then it's for gravity
Answer:
force-strength,power or energy as an attribute of motion, movement or action. Example: Frictional force.
Well first graph represents rectangular hyperbola
vu = c^2 ( c is constant)
AS 1/v + 1/u = 1/f
Take1/ f to be constant c
1/v = c - 1/u
it is of the form y = - x + k
Slope = -1 having intercept k as shown in fig 2