4 km 100 min

It is proportional because the amount of water sprayed ÷ the number of days of water spraying = the amount of water sprayed every day.

0.8 million cubic meters

When the number of days of gushing is fixed, the total amount of water sprayed is directly proportional to the daily amount of water sprayed.

160 240 320 400 480

In direct proportion, I judge by the fact that all these points in the picture are on the same straight line.

360 km 5.5 hours

Reverse the total number of pages in the book, the number of pages read every day, the number of pages read every day, and the number of days read every day.

100 50 20 10 5 2

1×100 =1002× 50 =1005× 20 =100a: same size.

Represents the total amount of money × the number of sheets = the total amount of money (certain)

Is inversely proportional, because face value × number of sheets = total amount of money (certain).

Because speed × time = distance (certain)

Because length × width = area (certain)

No, because (length+width) ×2= perimeter (certain) here is not a product or a ratio.

Because the bottom area × height = the volume of the cone (certain)

The remaining pages vary with the number of pages read.

Used at the end of a rhetorical question that begins with … is it or is it not?

be in reverse ratio

30 kilometers

Positive 405 0.75 1

Anti-20 8 48

Inverse proportion, positive proportion, positive proportion, positive proportion, positive proportion, positive proportion, positive proportion.

24 12

Inverse ratio because vehicle load × number of vehicles required = total material (certain).

20 cars

20 40 60 100 120 is directly proportional because the quantity of materials transported ÷ the number of times transported = the quantity of each shipment (certain).

5 times

In direct proportion, because distance ÷ time = speed (certain)

5 km 12.5 km

Actual distance on the map

80 1:8000000

1000000 1000000 15 1

1:8000 0-50 km

③③②②

1:8000000 0-80km

400 1:40000 2400

1: 2000000 0.5 km 500 cm

1050km

3,720 kilometers

1200 km 600 m

720,000 square meters

12: 30

×√××

1:3 ⑤ 1.5: 1 ③ 1:2

D

1500m2

Quantity, unit price, proportional time, positive 64 5/27 10 0.48.

9.6 cm 60 minutes 50 kg 5 days 2.4 hours 48 minutes

2.4 1.5 3 2 On the contrary, it is because the amount of coal burned per day × the number of days of coal burning = the total amount of coal burned (certain).

On the contrary, the area of each square brick × the number of blocks needed = the classroom area (certain).

It is precisely because of the quality of medicine that potion = concentration (certain)

Line 64 is 85km 1 125, with 24m 18 days and 750km.