Test Review

Vocabulary

3-1 Relations and
Functions

3-2 Representations of Functions

3-3 Comparing Linear and Nonlinear Functions

Do You Remember

100

Straight up and down

A. Horizontal

B. Diagonal

C. Vertical

100

x 1 - 2 - 3 - 4

y 5 - 6 - 7 - 8

Why is this a function

Because every input has one output

100

Work out this problem to match the equation to its ordered pair:

y = 2x + 5

A. (2,4)

B. (2,9)

C. (2,7)

B. (2,9)

y = 2x + 5

y = (2x2) + 5

y = 4 + 5

y = 9

100

Which of the following ordered pair is nonlinear with the inputs of 0,1,2 and 3

A. (0,1) (1,3) (2,4) and (3,6)

B. (0,1) (1,2) (2,3) and (3,4)

C. (0,0) (1,2) (2,6) and (3,9)

C. (0,0) (1,2) (2,6) (3,12) goes from increasing by 2, then 4, then 8, making it nonlinear

100

Topic 1-8 - Powers of 10 to Estimate Quantities

Which number is the largest?

A. 7 x 10^-9

B. 8 x 10^-8

C. 6 x 10^-4

7 x 10^-9 = 0.000000007 (7 billionths)

8 x 10^-8 = 0.00000008 (8 hundred millionths)

6 x 10^-4 = 0.0004 (4 ten thousandths)

200

To arrange in a specific way

A. Order

B. Analyze

C. Diagram

A. Order

200

x y

1 2

3 4

5 6

7 8

Why is this a function

Because every input has one output

200

Work out the following problem to identify the equation represented by the ordered pair:

(0,-3) (2,1) (5,7)

A. y = 2x + 3

B. y = 3x - 2

C. y = 2x - 3

(5,7)

y = (2 x 5) - 3

y = 10 - 3

y = 7

200

Which one of the following is nonlinear?

A. y = 7x

B. y = x² + 3

C. y = 2(x + 5)

B. y = x²+ 3

200

Topic 2-1 - Combining Like Terms to Solve Equations

Solve for s: 9.99s + 7.99s = 53.94

A. 3

B. 5

C. 7

A. 3

9.99s + 7.99s = 53.94

17.98s = 53.94

17.98/17.98 = 53.94/17.98

s = 3

300

To say what you think may happen

A. Predict

B. Classify

C. Evaluate

A. Predict

300

Which one of the two following ordered pair can you get rid of to make a function? *There are 2 answers

(1,3) (2,4)

(1,7) (3,5)

(1,3) or (1,7)

300

Solve for y when x = 3

y = 2x + 5

A. y = 15

B. y = 11

C. y = 20

B. 11

y = 2x + 5

y = (2 x 3) + 5

y = 6 + 5

y = 11

300

Which two outputs are missing from the following points? (0,12) (2,8) (4,_) (6,_)

A. 0 and 4

B. 4 and 0

C. 6 and 10

B. 4 and 0

y = 12 - 4 = 8

y = 8 - 4 = 4

y = 4 - 4 = 0

300

Topic 2-4 - Equations with No or Infinite Solutions

Which of the following operations prove that 6 = 6 is true?

A. 6x - 6x +6 = 6x - 6x + 6

B. -6x + 6 - 6 = -6x + 6 - 6

C. 6 - 6x + 6 = 6 - 6x + 6

A. 6x - 6x + 6 = 6x - 6x + 6

0 + 6 = 0 + 6

6 = 6

400

To change something so that it is easier to understand

A. Explain

B. Simplify

C. Identify

B. Simplify

400

Mr. Morton is cooking dinner for his 8th grade class at his supper club. One ticket costs $25, (ticket, cost): (1,25) (2,50) (3,75). Why is this a function?

Because because every ticket quantity has exactly one cost. Or every input has one output. Or every ticket has one cost

400

Which of the following representations describe the same linear functions? y = 6x + 1

A. (2,15)

B. (1,8)

C. (0,1)

y = 6x + 1

y = (6 x 0) + 1

y = 0 + 1

y = 1

400

What is the constant rate of the graph that is on the card?

A. 2

B. -1

C. -2

9 - 2 = 7

7 - 2 = 5

5 - 2 = 3

3 - 2 = 1

400

Topic 2-5 - Comparing Proportional Relationships

Mr. Morton is going apple picking, to make his students some apple pies. He is choosing three places to shop. Which place has the better deal?

A. Paris's Pick It Place at $5.00 for 12 pounds

B. Melton's Mountain O'Apples at 10 pounds for $20

C. Ms. Outerbridge's Orchard at $7.25 for 20 pounds

A. $5/12lbs. = .42 per pound

B. $20/10lbs. = .50 per pound

C. $7.25/20lbs. = .36 per pound

500

To give out shares of something

A. Distribute

B. Relationship

C. Interpret

A. Distribute

500

Why is the relation on the card not a function?

Because the input #2 has two outputs

500

Mr. Morton has a tutoring service for math that charges $35 up front and $10 for each hour of tutoring. Using the formula y = 10x + 35, how much would he charge for 3 hours of service?

A. $50

B. $60

C. $65

y = 10x + 35

y = (10 x 3) + 35

y = 30 + 35

y = 65

500

Which pair of points could extend y = 3x + 4?

A. (4,16) (5,19)

B. (4,15) (5,18)

C. (4,17) (5,20)

A. (4,16) (5,19)

y = 3x + 4 y = 3x + 4

y = (3 x 4) + 4 y = (3 x 5) + 4

y = 12 + 4 y = 15 + 4

y = 16 y = 19

500

Topic 2-7 - Analyzing Linear Equations (y=mx)

Write an equation to describe the relationship in the graph:

A. y = 10

B. y = 20

C. y = 30

B. y = 20

Y_{2 -}Y₁ = X₂- X₁

(y) 80 - 60 = 20

______________

(x) 4 - 3 = 1

20/1 = 20