What is a decreasing fucution

What is the location of point g, which partitions the directed line segment from d to f into a 5: 4 ratio? –1 0 2 3

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be able to prepare using the sauce?