Girls please talk with me I am just s o sa d and please don't think anything b a d as I don't want any trouble to anyone #notbad

The graph below shows the amount of money left in the school’s desk fund, f, after d desks have been purchased. for each new desk that is purchased, by how much does the amount of money left in the school’s desk fund decrease?

Plz which expression is equivalent to the expression below?

Which property is illustrated by the statement given below? raj raj.