In: Economics
Other things the same, if the Fed increases the money supply, the interest rate
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 rises so aggregate demand shifts right.  | 
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 rises so aggregate demand shifts left.  | 
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 falls so aggregate demand shifts right.  | 
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 falls so aggregate demand shifts left.  | 
Falls so aggregate demand shifts right.
Explanation: When the money supply increases, the money supply curve shifts right. So, the money supply curve intersects the money demand curve towards the right and at a lower point. Therefore, the interest rate falls.
When the interest rate falls, consumers can avail more credit and spend more. So, aggregate demand increases.