Pre-Algebra: Functions!

Vocab/ Domain & Range

100

1. When a graph goes up from left to right

2. When a graph goes down from left to right.

1. Increasing

2. Decreasing

200

When a line is straight; it can be connected or not.

Linear

300

1. When a graph is not connected by a line and is only distinct points on a graph.

2. When a graph is connected by a line. All values on the line are included in the relationship.

1. Discrete

2. Continuous 

400

1.What is the domain of the function in the graph?

2. What is the range of the function in the graph?

1. 0-70 adult tickets

2. 0-140 children's tickets

500

Sort these terms into the two categories: x and y

- Domain

- Range

-Independent Variable

-Input

-Dependent Variable

- Output

x: Domain, Input, Independent Variable

y: Range, Output, Dependent Variable

Writing Equations

100

Write an equation in slope-intercept form:

slope = 3/4

y-intercept = -7

y=3/4x-7

200

Rearrange the equation into slope-intercept form:

2x+8y=8

y=-2/8x+1

300

Write an equation in slope-intercept form from the table:

                

     

y=12x - 4

400

Write an equation in slope-intercept form from:

(-1,-7) and (2,2)

y=3x-4

500

Write the equation of a line from:

(-3,6) and (1,-2)

y=-2x

Graphing

100

Graph the equation:

y= 2x+1

200

Graph the equation:

y= x - 4

300

Graph:

y= -2/3x+2

400

Graph:

x + 3y=9

y=-1/3x+3

500

Graph:

2x+5y=10

y=-2/5x+2

Slope

100

Find the slope of the graph:

-2

200

Find the slope of the graph

-4/5

300

Find the slope from the equation:

y=-7/2x + 51

-7/2

400

Find the slope from the table:

4

500

Find the slope of two points:

(1,1) and (-5,2)

-1/6

Function vs. Not Function

100

Find your output when x= -2

Rule: y=2x+1

-3

200

Find your output when x=4

y = x²

16

300

Is this table a function?

no

400

Is the graph a function?

no

500

Is the table a function?

yes