Five products:A.
Bread-Elastic demand and demand curve is flat because bread has other substitutes.
Change in price(dp)=-.75-1=-.25
Change in quantity(dp)=3-2=1
Slope=1/-.25=-4
B.milk-Inelastic demand as no substitutes are available.
dp=1.25-2=.-75
dq=1-.75=.25
Slope=-.25/-.75=-.33
C.sugar-Elastic demand as substitutes are available like honey.
dp=.5-.75=-.25
dq=6-3=3
Slope=dq/dp=3/-.25=12
D.salt-no substitutes and inelastic demand
dp=2-5=-3
dq=1-.75=.25
Slope=.25/-3=-.08
E.clothes-Elastic demand as I have too much of it already and the purchase can be postponed.
dp=1-2=-1
dq=8-3=5
Slope=-5
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