Study all your notes. Notes are always the way to go.
Answer with Explanation:
The <em>peak, trough, recession and recovery</em> are stages of the "Business Cycle." They can be represented in a line graph as points that represent individual stages. Each can tell what a country's economy is experiencing in terms of fluctuations happening in economic activities.
The peak is that highest point in the graph. It means that the economy is producing the maximum output that it is allowed to do so.
The trough is the lowest point in the graph. This marks the<em> end of depression.</em> This means that soon, the<em> economy will try to recover.</em>
The recession is that point on the graph that goes down following the peak. This is a period of economic decline or contraction. Here, the production decreases.
The recovery is that point on the graph that goes up following the trough. This stage is marked by increase in demand and production. It is considered to be the end of the business cycle.
More than 150 years ago, inventors began working on a bright idea that would have a dramatic impact on how we use energy in our homes and offices. This invention changed the way we design buildings, increased the length of the average workday and jumpstarted new businesses. It also led to new energy breakthroughs -- from power plants and electric transmission lines to home appliances and electric motors.
Like all great inventions, the light bulb can’t be credited to one inventor. It was a series of small improvements on the ideas of previous inventors that have led to the light bulbs we use in our homes today.
Hey don't read this...
D)<span>by looking at total product, marginal product, and changes in both after changes in inputs
</span> :D Now that you've seen this you will get a perfect A on the test ^.^
Pass this on to someone's answer and replace my answer with the answer you get.
HAVE FUN and GOOD LUCK :P