1. all other things constant

2. there are lots of conditions

3. all things are normal

4. conditions are the assumptions

1. perfectly elastic

2. perfectly inelastic

3. Unit elastic

4. none of the above

1. demand

2. supply

3. utility

4. satisfaction

1. They we downward sloping

2. They are comes to the origin

3. They do not intersect

4. They are concave to the origin

1. sunk cost

2. fixed cost

3. variable cost

4. total cost