The slope of a demand curve is not used to measure the price elasticity of demand because
a) the slope of a linear demand curve is not constant.
b) the slope of a line cannot have a negative value.
c) the measurement of slope is sensitive to the units chosen for price and quantity.
d) the slope of the demand curve does not tell us how much quantity changes as price changes.

Carmen’s beauty salon has estimated monthly financing requirements for the next six months as follows: january $ 9,000 april $ 9,000 february 3,000 may 10,000 march 4,000 june 5,000 short-term financing will be utilized for the next six months. projected annual interest rates are: january 9 % april 16 % february 10 may 12 march 13 june 12 what long-term interest rate would represent a break-even point between using short-term financing and long-term financing?