Pre-Algebra Mrs. Fisher Chapter 9 Review Pre-Algebra Mrs. Fisher

Use the graph to write the ordered pair for each point Use the graph to write the ordered pair for each point. 1) P 2) L 3)J 4)M 5) N

1. (2, -4) 2. (-4, 4) 3. (3,4) 4. (-1, 3) 5. (-3, -4)

{(2,0), (2,2), (2,4), (2,6)} Determine whether the relation is a function. Write either function or relation to answer.

Relation

{(1,12), (4,18), (7,22), (10, 28)} Determine whether the relation is a function. Write either function or relation to answer.

Function

Determine whether this is a relation or a function.

Relation (use vertical line test)

Determine whether this is a relation or a function.

Function (use vertical line test)

Determine whether this is a relation or a function. Domain Range Determine whether this is a relation or a function. -2 -1 1 2 4 7 8 11

Function

The relation {(4,1), (5,3), (8,-2), (-9, 3)} is a function The relation {(4,1), (5,3), (8,-2), (-9, 3)} is a function. Write an ordered pair that would make the relation NOT a function.

(any pair where the domain (x) has two different ranges (y); Examples: (5,5), (8,3)

Solve the function.

Answers:

Which equation corresponds to the table of ordered pairs?

Answer: F

Find the slope.

Answer: F

State the slope and the y-intercept of 6x – 16y = 48

Answer: m= 3 8 b= (0, -3)

Answer: - 3 11

Find the slope of the line that passes through L (5, -6), M (9,6)

Answer: 3

Find the slope.

Answer: - 1

Find the constant rate of change.

Answer: 5 3

Find the constant rate of change and interpret it’s meaning.

Answer: 2; For every two stepping stones added, the path becomes one meter longer.

State the slope and y-intercept of the line. y = 2 3 x -1

M= 2 3 b= -1

Graph the following line: y= - 1 4 x + 8

Answer: m= -1/4 b= 8 (0,8)

Graph the equation.

Answer: m= -18/1 b= 675 (0,675) -I used each cube as 100!

Problem-Solving Review

Mrs. Fisher needs to rent a speaker system for upcoming 6th grade promotions. The fee from Best Buy involves a $120 fee plus $30 a day. Talking Systems Inc. offers a lower flat rate of $100, but a higher daily rental fee of $50 a day. The equations for both companies are below. Scenario Best Buy Talking Systems Inc. C= 30d + 120 C= 50d +100

Mrs. Fisher needs to rent a speaker system for upcoming 6th grade promotions. The fee from Best Buy involves a $120 fee plus $30 a day. Talking Systems Inc. offers a lower flat rate of $100, but a higher daily rental fee of $50 a day. The equations for both companies are below. Part 1: Mrs. Fisher will rent the speakers for 6 days. Determine which company should be used to rent the equipment based on the cost of a 6 day rental. Best Buy Talking Systems Inc. C= 30d + 120 C= 50d +100

Best Buy Talking Systems Inc. C= 30d + 120 C= 50d +100 Answer: Best Buy would be the better choice since it is $100 cheaper for 6 days. Determine the cost of both companies. ‘d’ is the amount of days. Plug into each equation. Best Buy: C= 30(6) + 120 = 180 + 120 = $300.00 Talking Systems: C= 50 (6) + 100 = 300+ 100 =$400.00

Mrs. Fisher needs to rent a speaker system for upcoming 6th grade promotions. The fee from Best Buy involves a $120 fee plus $30 a day. Talking Systems Inc. offers a lower flat rate of $100, but a higher daily rental fee of $50 a day. The equations for both companies are below. Part 2: Would Best Buy always be the best choice? Explain your thinking. Best Buy Talking Systems Inc. C= 30d + 120 C= 50d +100