Flight time/hour 2, 5, 6 and 9

Voyage/km1460.36650.100000000005

(1) Write down the ratio of each voyage and the corresponding flight time, and compare the ratios.

(2) Explain the meaning of this ratio.

(3) Is the range in the table proportional to the flight time? Why?

2. Judge whether the two quantities in each question below are in direct proportion, and explain them.

(1){ composition for primary school students} has a fixed unit price, total price and subscription quantity.

② The height of Xiao Xin's high jump and his height.

(3) The yield of wheat per hectare remains unchanged, and the number of hectares and total output of wheat remain unchanged.

(4) The total number of pages in a book is certain, including the number of pages read and the number of pages not read.

The following is a numerical table corresponding to the driving distance and fuel consumption of a certain car.

Distance traveled/km 15 30 45 75

oil consumption

(1) Is the fuel consumption in the table directly proportional to the driving distance? Why?

(2) The next page 1 is an image showing the relationship between the driving distance and the corresponding fuel consumption. Tell me about its characteristics.

(3) Using image estimation, what is the fuel consumption of a car driving 55km?

One word at a time, adopt it.