Jose bought a 20-pound bag of food for his dog.
he fed his dog one half of pound of dog
y represent the mount of dog food that remains at the end of each day,
Only hlaf pound is used in each day,
Let x be the number of days
since pounds of food used in 1 day = 0.5
then pounds of food used in x days = 0.5x
The amount of food left = Total food available - food used to feed the dog in x days
The amount of food left = 20 - 0.5x
thus, y = 20 - 0.5x
Answer : y = 20 - 0.5x
