You Like to Go to the Neighborhood Salad Smorgasbord for a Meal

Essay

You like to go to the neighborhood salad smorgasbord for a meal. The smorgasbord has a fixed charge for the salad makings but charges separately for drinks. When you had 2 sodas, you paid $11.45. When you had 4 sodas, you paid $13.95.
A) Write an equation that would enable you to tell the cost c (in dollars) for the salad makings and sodas d.
B) What does the slope of the equation tell you about this situation?
C) What is the cost for the salad alone?