Which inequality will have a dashed boundary line with a shaded area above its graph

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?

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the