The function f(x) varies inversely with x and f(x)= -10 when x = 5
what is the inverse variation equation?

a. f(x) = -2/x
b. f(x) = - 50/x
c. f(x) = - 0.5/x
d. f(x) = -5/x

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project