(2) Anti-20 8 48

2.( 1) is inversely proportional

(2) in direct proportion

(3) Out of proportion

(4) in direct proportion

(5) inversely proportional

(6) inversely proportional

(7) in direct proportion

3.( 1) 24 12

① Answer: Because the load× quantity = 120 (certain), the load is inversely proportional to the number of vehicles required.

② 120÷6=20 (vehicle)

(2) 20 40 60 100 120

① Answer: Because quantity/times =20 (certain), the number of times of transportation is directly proportional to the quantity of materials transported.

② 120(6×4)= 5 (times)

4.( 1) A: Because distance/time = speed (certain), distance is directly proportional to time.

(2) A: 1500÷20=75 (km/h) B: 1600÷20=80 (km/h) 80-75=5 (km/h)

(3) 2.5× 5 =12.5km.