Scribe Post for Tuesday (3-25-08)

Today we took the quiz LS- 46 (Sandy Dandy Dune Buggies) and that was all we did today. Yea it was hard and it's due by tommorrow before class starts. it's on moodle

Maxx Scribe

Today we learned about completing the square method.
In problems PG 23 and PG 24 you found out how to change a quadratic function from the standard form
(standard form) y= ax^2+bx+c (graphing form) y=a(x-h)^2+k
which is to figure out the vertex by using the average of the x- intercepts and then to substitute it the coordinates of the vertex for h and k.

This is what Completing the Square method looks like.

Its similar to the box method that we used before but a bit different. Everything is pretty self explanatory because it works the same way.

Exponential Function by. Maxx Kim

pg. 88
FX- 60 a) f(x)= 3x^2
This is not a exponential function because there is a ^2 instead of ^x. All exponential functions look the similar on a graph. Below is what a) looks like. As you can see its a parabola.



b) h(x)= (3)^x
This is a exponential function because the exponent is x. As long as it has the x as a exponent it is a exponential function. My proof that it is a exponential function is because of the graph.




Every exponential Function will be graphed like this.

Another example, c)
y=5(4)^x
again this is another exponential function because it has the x as a exponent. This graphed looks like this.

again the graph looks the same at b)

One more example, d)
g(x)=(2.46) ^x
Again this is a exponential function because it has the x as an exponent. This is what the graph looks like. Again you will see that it is similar.