The demand for bread is likely to be more elastic than the demand for solid-gold bread plates

An assumption that makes an economic model simpler without affecting its conclusions in important ways is

a. an indication of a positive assumption b. an efficient assumption c. useful in disguising the valid conclusions d. a simplifying assumption e. a critical assumption

A short-run supply curve is

a. horizontal, summing individual supply curves b. temporary, and disappears when price rises c. downward sloping reaching the horizontal axis d. upward sloping e. vertical