4-5

well to be honest i really dont remember much of this week. This is probally due to the four day weekend we had. We took a test friday, but i really dont remember anything before that. But anywho, i do remember section four five,. This was one if the harder sections of the chapter. Section four five is on inverses.The rules that you have to follow are simple..
1.Draw or sketch the graph
- x^2= parabola
-x= a line
-x^3 = this line..
-sqrt x=that thing..
- ab. value = "v"

* if the graph passes the horoizontal line test, it has an inverse.

2. next you switch the x's and the y's
3. Solve for y

ex.
f(x)=x^2+3x
1.has no inverse because it does not pass the horizontal line test.

ex. y=5x+3
1. passes the horizontal line test
2.x=5y+3
x-3=5y
y(-1)=1/5x-3/5 <---inverse

ex. y=l3xl -6
1. does not pass horizontal line test