7th Chapter 6 Quiz 2 Review (Linear Functions)

Relations and Functions

100

What is the Domain of this relation: (0,0), (1,1), (2,2), (3,3)

D: {0,1,2,3}

200

What is the Range of this Relation: (1,1), (-1,1), (2,4), (-2,4)

R: {1,4}

300

For the function f(x)=2x+1, what would the Range values be if you use the Domain values of -2, -1, 0, 1, and 2?

R: {-3,-1,1,3,5}

400

Is this relation a function?
(6,1), (8,3), (7,2), (6,8)

Why or why not?

Not a function, because the x-value 6 has more than one y-value

500

Is this relation a function?
(9,0), (7,2), (3,-2), (2,-4)

Why or why not?

Yes it is a function, because each x-value only has one y-value

Scatter Plots

100

Decide whether a positive, negative, or no correlation may exist: 

Length of Vacation Stay and Expenses

Positive Correlation

200

Decide whether a positive, negative, or no correlation may exist: 

Eye Color and Birth Month

No Correlation

300

Decide whether a positive, negative, or no correlation may exist: 

Temperature and Elevation

Negative

400

Draw a Scatter Plot with a Positive Correlation

Look at Scatter Plot

500

Draw a Scatter Plot with a Negative Correlation

Look at Scatter Plot

Slope and Intercepts

100

How do you find slope of a line from a graph?

Rise/Run

200

Find the Slope of the Line that passes between through these pair of points: 

(9,17) and (-1,3)

MAKE SURE YOUR ANSWER IS SIMPLIFIED

7/5

300

Find the Slope of the Line that passes between through these pair of points: 

(0,9) and (0,4)

Undefined

400

Find the x-intercept of the equation y=3x-6

x=2

500

Find the y-intercept of the equation y=-3x-24

y=-24

Slope-Intercept Form, Standard Form, and Point-Slope Form

100

Write in slope-intercept form:

4x+2y=-1

y=-2x-1/2

200

Write in Slope-Intercept Form:

6x-2y=14

y=3x-7

300

Write an equation of the line in slope-intercept form AND standard form:

slope: -2

y-intercept: 1

y=-2x+1

2x+y=1

400

Write an equation of the line in slope-intercept form AND standard form:

slope: 3

y-intercept: 2

y=3x+2

-3x+y=1

500

Write an equation in point-slope form:

point 1: (3,0)

point 2: (0,-12)

y=4(x-3)

OR

y+12=4(x)

Parallel and Perpendicular Lines

100

Write an equation that is parallel to this line:

y=-2x+3

Answers vary, slope must be -2

200

Write an equation that is perpendicular to this line:

y=3/4x-3

Answers vary, slope must be -4/3

300

Are these two lines parallel, perpendicular, or neither?

y=3x+4

-4x+2y=4

Neither, slopes are 3 and 2

400

Are these two lines parallel, perpendicular, or neither?

y=-9x+3

-x+9y=-9

Perpendicular; slopes are negative reciprocals

500

Are these two lines parallel, perpendicular, or neither?

y=5x+2

-10x+2y=-6

Parallel; same slope