How do changes in the federal funds rate affect the unemployment rate?

It becomes cheaper for households and businesses to borrow money. Lower interest rates encourage spending and investment leading to increased economic activities. And job creation; businesses may hire more workers due to improved economic conditions.

How do changes in the federal fund rate affect inflation rate?

Is one; by boosting demand. You see, cheaper borrowing stimulates consumer spending and business investment. Also, increase demand, as demand for goods and services rises; prices may increase. And finally, wage pressure, stronger demand can lead to higher wages, contributing to inflation.