Week 12 in Prec11

In the week 12, we learnt the chapter 5 graphing inequalities and systems of equation. I think it’s easy to graphing because you just need to graph the equation and the area you need, the hardest point is to find the area you need. I have a easier way to find it instead to find a test point.

First , of course you need the graphing of the function. 

And there are 4 points I graph out , they are all “above” the functions which are not we need to calculate. And what we need is the black areas, when the points are “above” the function , they are greater than the function, the points are “below” the function,they are less than the functions. So now we have the answer, the black area are all “below” the functions, so they are all less than the functions.

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