Joseph owns a hot dog stand and sells specialized hot dogs. he charges $1.50 for a plain hot dog and then an additional $0.50 for each topping that you want. this can be modeled by the equation c = .5x + 1.5, where c is the total cost of the hot dog and x is the number of toppings you ordered. hattie sells hamburgers at the stand next door and has the same basic cost except she charges $2.50 for a plain hamburger and then $0.25 for each additional topping. how should she change joseph's cost equation to represent her hamburger cost?