unit+5+journal+responses

quadratic fucntions

__** 5.1: **__
List the following words and give a mathematical definition in your own words on your wikispace. Remember, you may edit your definitions after we begin the unit.
 * quadratic : a parabola
 * vertex : point where two or more straight lines meet. Corner
 * x-intercept: where a line intersects
 * y-intercept : where a line intersects
 * increasing: when a line goes up
 * decreasing : when a line goes down
 * maximum: the biggest number
 * minimum the lowest number
 * parabola: its a intersection

Answer the following questions in your wikispace.


 * What graphical shape did the football create as it flew through the air?
 * Identify the vertex.
 * Describe, in context, what the x-coordinate of the vertex represents.
 * Describe, in context, what the y-coordinate of the vertex represents.
 * Find f(2). Describe what your answer means in the context of the problem.

5.4
Function 1:

Table answers:

28, 13, 4, 1, 13, 28

The graph is opening up. and its a U-Shape.

Function 2:

Table answers:

-8, -3, 0, 1, -3, -8

Its a U-shape graph and it opens down.

Function 3:

Table answers:

9, 4, 1, 0, 1, 4, 9

Its a U-shape graph again and it opens up.

5.5:
It's a U-shape graph starting from the bottom and going down to the bottom of the x coordinate.

h(1) means the the height of the ball after one second which is 27 feet. (1,27)

the y-int is 3 and that represents the initial height where the ball was trough. (0,3)

The Vertex of the graph represents the heights point that the ball can get. which is (1.25,17)

<span style="font-family: 'Arial Black',Gadget,sans-serif;">The X-int. Means when the ball touches the ground.

5.6:
<span style="font-family: 'Arial Black',Gadget,sans-serif;">The zero property is a way to find the two X-int. of a function by plodding in 0 as y and making the inversal operation and then taking out the squard root and using your two probabilities.