[填空题]
The amount of fuel in a car's tank,dwci mp4-d72k V, in litres, can vs* yjgs3i+*mq2tqs-6 anw 1xbe modelled by a linear function, V=mx+c, where x is the d tawqj2-sgm+*3iyqsnx6* 1sv istance driven measured in kilometres.
After driving 100 km, the amount of fuel in the tank is 33 litres.
1.Write down an equation that describes this information.
After driving 250 km, the amount of fuel in the tank is 22.5 litres.
2.Write down an equation that describes this second piece of information.
3.Calculate the amount of fuel in the tank after driving 50 km. V = litres