Tuesday 1/26

Presentation

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Mathematics

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8th Grade

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Medium

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CCSS

8.F.B.4, HSF.LE.A.2, 8.EE.C.7

Standards-aligned

Katie Butler

Used 1+ times

FREE Resource

22 Slides • 20 Questions

Tuesday 1/26

Work on your warm up minute for today

Review from Yesterday

Writing Equations from table, graph, and word problems

Multiple Choice

Which equation best represents the relationship between x and y in the table shown?

y= 5x+5

y=1/5x+5

y=15x+5

y=10x+5

Multiple Choice

Give the equation for the graph

y = 5x - 3

y = 4x + 2

y =-2x + 5

y = - 2x + 4

Multiple Choice

Bob's Plumbing charges $15 per hour plus a service fee of $40 for coming out to your house. Which equation models this situation?

y = 15x + 40

y = 40x + 15

y = 15x

y = 15x - 40

The next few slides will be a word problem we pick through together and then a slide for you to answer it

Ace Telecommunications charges $0.12 per minute of phone use plus a monthly service fee of $8.00 for it phone service. Which equation can be used to find c, the total cost for one month when m, minutes are used?

Multiple Choice

c = 0.12m + 8m

c = 8m + 0.12m

c = 0.12m + 8

c = 0.20m

Eddie's Electric charges $90 per hour plus a $50 traveling fee. Which equation models this scenario?

Multiple Choice

Eddie's Electric charges $90 per hour plus a $50 traveling fee. Which equation models this scenario?

y = -50x + 90

y = 90x + 50

y = -90 - 50x

y = 50 - 90x

A holiday meal cost $12.50 a person plus a delivery fee of $30. Which equation represents the amount a holiday meal costs(y), including delivery, for x people?

Multiple Choice

A holiday meal cost $12.50 a person plus a delivery fee of $30. Which equation represents the amount a holiday meal costs(y), including delivery, for x people?

y = 12.50 + 30x

y = 30 + 12.50x

y = 12.50 + 30

12.50x = 30

Scott's Automotive charges $35 for each car plus $7 per hour. Write an equation that represents this scenario if Kylie was charged $63.

Multiple Choice

Scott's Automotive charges $35 for each car plus $7 per hour. Write an equation that represents this scenario if Kylie was charged $63.

35x + 7 = 63

7x = 63

7x - 35 = 63

7x + 35 = 63

Dexter's Gym charges a one-time registration fee of $40 and $20 each month. The total fee after x months is $340. Which equation models this situation?

Multiple Choice

Dexter's Gym charges a one-time registration fee of $40 and $20 each month. The total fee after x months is $340. Which equation models this situation?

40x + 20 = 340

20x + 40 = 340

20x - 40 = 340

20 + 340 = 40x

Mallory bought pizza and soda for a party. If she spent $12.57 on the sodas and $10.95 for each pizza, how many pizzas did she buy if her total is $89.22?

Multiple Choice

Mallory bought pizza and soda for a party. If she spent $12.57 on the sodas and $10.95 for each pizza, how many pizzas did she buy if her total is $89.22?

10.95x + 12.57 = 89.22

12.57x + 10.95 = 89.22

89.22x -10.95 = 12.57

12.57 + 10.95 = 89.22

Multiple Choice

What could this represent? 7x + 2 = 30

Buying pet turtles for $7 each plus two cans of turtle food cost $30.

Seven bags of candy plus 2 extra snickers bars equals 30 dollars.

Two yoyos plus seven frisbees is thirty cents.

Buying seven calculators plus $2 per bundle of pencils is $30.

Comparing Functions

To compare functions:

Compare slopes
Compare y-intercepts

Multiple Choice

Which equation has the steepest slope?

y = 10x - 5

y = 8x - 2

Multiple Choice

Which line is the steepest?

Line A

Line B

Line C

Line D

Multiple Choice

What slope is the steepest?

Harry is in need of a mechanic. Larry's Automotive charges $65 per hour. Roland's Mechanic House charges $60 per hour.

Who should Harry select?

Harry is in need of a mechanic. Larry's Automotive charges a flat fee of $150 and then $65 per hour. Roland's Mechanic House charges $60 per hour and a flat fee of $300.

Who should Harry select if it will take 4 hours to complete his car?

Ron is looking for a pet sitter for his pet rat. Hagrid's Pet Service charges an initial fee of $20 and then $5 for each day after that. Newt Scamander's Creature Care charges are included in the table to the right.

Who should Ron select if he needs a sitter for 10 days?

Multiple Choice

The cost of Nate’s service is described by y = 4x + 6. The table shows the cost of Beth’s service. Find the equation for Beth's service. Which service is cheaper for 8 movies in one month?

Beth's service ($38 vs. $40) is cheaper

Nate’s service ($42 vs. $44) is cheaper

Nate’s service ($38 vs. $40) is cheaper

Beth's service ($42 vs. $44) is cheaper

Multiple Choice

The table below shows some of the values for the linear function f.

Let g be the linear function defined by y = 4x + 5.

Which statement is true?

The graph of f has a greater slope than the graph of g.

The graph of g has a greater slope than the graph of f.

The graph of f has the same slope as the graph of g.

The slopes of the graphs of f and g are undefined.

Multiple Choice

Jay earns $50 per week, plus $5.25 for each hour worked in a given week. Fred’s earnings are calculated using the formula P = 6.25x + 50, where x is the number of hours Fred worked.

Which statement is true?

Jay earns $2.75 per hour less than Fred.

Fred earns $40 more than Jay for 40 hours of work.

Jay and Fred both earn the same for 40 hours of work in a week.

Fred earns $42 less than Jay each week when both work 0 hours.

Multiple Choice

Leonard compared the cost of purchasing a gallon of gas at two different gas stations.

The function C(g) = 3.25 + 0.07x models the average cost of a gallon of gas at the first gas station after x months. The table below shows the average cost of a gallon of gas at the second gas station after different numbers of months.

Which statement is true?

The first station had a higher initial price per gallon and increased at a greater amount per month than the second station.

The second station had a higher initial price per gallon and increased at a greater amount per month than the first station.

The first station had a higher initial price per gallon but increased at a smaller amount per month than the second station.

The second station had a higher initial price per gallon but increased at a smaller amount per month than the first station.

Multiple Choice

How much will you pay Store A per week for a phone?

$25

$150

$15

$50

Multiple Choice

Which kitten grows fastest? What is it's rate of change (slope)?

Kitten A with a rate of change of 3

Kitten B with a rate of change of 4

Kitten A with a rate of change of 4

Kitten B with a rate of change of 3

Multiple Choice

Who has the greater rate of change (slope)?

Troy has the greater rate of change.

Lucy has the greater rate of change

They have the same rate of change

Tuesday 1/26

Work on your warm up minute for today

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