According to Automobile Association of a Country,on March 27,2009,the National

Multiple Choice

According to automobile association of a country,on March 27,2009,the national average price per gallon of regular unleaded (86-octane) gasoline was $2.02,and the price of premium unleaded (91-octane) gasoline was $2.26.The cost of the blend of mid-grade unleaded gasoline (90-octane) .Select a graph of the region determined by the constraints. ​
Constraints:
​
X ≥ 0
Y ≥ 0
X + y = 1
86x + 91y = 90
​

A)
B) ​
C)
D)
E) ​