I need help with questions 8-10 I cant make mental images and I'm just bad at math so I need help

The cost c, in dollars, for bananas depends on the weight w,in pounds, of the bananas. this situation is represented by the function rule c=0.5w (graph each function rule.tell whether the graph is continuous or discrete)

Steve is scuba diving near his home in maui. at one point he is 100 feet below the surface. represent this number with a negative number. if he descends another 5 feet, what negative number will represents his.

F(x)= 4x g(x) =x-1 what is f(x) divided by g(x)