Question 176356
a.)Supply graph is in red.
Demand graph is in green.
{{{drawing( 300, 300,-20, 80, -100, 9900,grid( 1 ),circle( 0, 0, .2 ),graph( 300, 300, -20,80, -100, 9900, 5000 + 200x ,  9500 - 100x )) }}}
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b.) Supply goes up as price increases.
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c.) Demand goes down as price increases.
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At the equilibrium price,
{{{S=D}}}
{{{5000 + 200x =9500 - 100x }}}
{{{300x=4500}}}
{{{x=15}}}
The equilibrium price is $15.