Answer:
A. the line y=(-2/3)x+5 with shading below and the line y=(-x)+3 with shading above; both have a negative slope, with the first passing through (0,5) and the second through (0,3).
B. (5,1) is included; 2(5)+3(1)=13, and 13<15 5+1=6, and 6>3
C. (4,2) Michael could buy four sandwiches and two hot lunches for less than fifteen dollars and feed at least three students (he could feed 6)
