TTOHA1a Percentages and graphs

• Wiskunde
• Middelbare school
• havo, vwo
• Leerjaar 1

TTOHA1a Percentages and graphs

Program

- Practice last lesson + new theory (chapter 7)

- Bettermarks

- Repetition / practice chapter 9 in lessonup

- Formative test chapter 9 

- Quizizz chapter 7

Which one is correct?
Calculate what percent 12 of 84 is.

1. 12 : 84 x 100
2. 0,12 * 84
3. 84 : 12 x 100
4. 0,012 * 84

What percent is the fraction 17/20?

1. 17%
2. 17,20%
3. 68%
4. 85%

We did a film marathon with 35 students. In this table you can see how many movies everyone watched (5 students watched 0 movies, 9 students watched 1 movie, ...). What percent of the students watched 2 movies?

1. 6%
2. 17,1 %
3. 19,3%
4. 20,2%

What kind of diagram is this?

1. bar chart
2. pie chart
3. line chart
4. graph

WHAT IS IT?

1. BAR CHART
2. TABLE
3. PIE CHART
4. LINE CHART

WHAT IS IT?

1. BAR CHART
2. PIE CHART
3. LINE CHART

How many percent is 154 students out of 1276?

1. 0,12%
2. 12%
3. 8,29%
4. 14%

The number of students is 590 and increases with 20%. What is the new number of students?

1. 695 students
2. 702 students
3. 708 students
4. 732 students

A survey included 140 persons. How many of them has brown hair?

1. 20 persons
2. 7 persons
3. 14 persons
4. 10 persons

150 cars are inducted in this diagram. How many of them are green?

1. 60 cars
2. 34 cars
3. 53 cars
4. 51 cars

To do now: 

Bettermarks:

Monday: 4.1 & 4.2 in bettermarks

Wednesday: 4.4 (choose havo or vwo) & 4.5 in bettermarks

Thursday: 4.7, 4.8 (VWO only) and 5.1 & 5.2 in bettermarks

Which point is on the graph?

y=x​2​​+2x

1. None
2. (2,6)
3. (2,10)
4. (2,8)

If you want to draw a graph for this table, what are the coordinates for 5 hours of work?

1. (5, 20,50)
2. (5 - 20,50)
3. (5: 20,50)
4. (5; 20,50)

Does the point (7,20) lie on the graph..?

y=3x−1

1. Yes
2. No

Is this proportional mapping?

2	6	20
5	9	50

1. Directly Proportional mapping
2. Inversely proportional mapping
3. No proportional mapping

Does the point (40,121) lie on the graph?

y=3x−1

1. Yes
2. No

Does the point (9,26) lie on the graph?

y=3x−1

1. yes
2. no

Which one is a quadratic formula?

1. 
2. 
3. 
4. 

Is this proportional mapping

1. Directly proportional mapping
2. Inversely proportional mapping
3. No proportional mapping

What kind of relationship is this?

1. Lineair relation
2. Quadratic relation
3. Proportional mapping

Which one is a quadratic formula?

1. y = 4x + 8
2. y = 4x² + 8
3. y = 10 - 2x
4. geen idee

If you want to draw a graph for a formula, what are the first two steps?

1. Make a table Make the graph
2. Make a graph Make the table
3. Make a table Make a coordinate plane
4. Make a coordinate plane Make the graph

Is this proportional mapping?

3	12	8
5	20	10

1. directly proportional mapping
2. inversely proportional mapping
3. no proportional mapping

Which points lie on the graph?

y=2x​2​​+3

1. (2,11)
2. (0,3)
3. (3,0)
4. (1,4)

Which formula is a quadratic formula?

1. y = 3x + 5
2. y = 12 - 2x
3. y = 5x² + 14

y = 2x - 4
Calculate y for x = 6

1. y = 8
2. y = 4
3. y = 12
4. y = 6

y = -x - 2
Calculate y for x = -5

1. y = 3
2. y=-3
3. y=-7
4. y=-5

Parabola

• quadratic formula or function
• Vertex: maximum or minimum
• Zeroes: intercection points with x-axis
• y-intersept 

What is the vertex?

1. (0, 0)
2. (3, 9)
3. (6, 0)
4. (9,3)

What is the vertex?

1. (0,0)
2. (1, 0)
3. (-1, 2)

What are the zeroes of the red graph?

1. (-5, 0) and (1, 0)
2. (0, -5) and (0, 1)
3. (0, -3)
4. (-3, 0)

What is the y-intercept of the red graph?

1. (-5, 0) and (1, 0)
2. (0, -5) and (0, 1)
3. (0, -3)
4. (-3, 0)

What is the vertex of this parabola?

1. (1, 5)
2. (5, 1)
3. (0, 2)
4. (2, 0)

Formative test chapter 9 

• Tables apart
• Work in silence
• Work on a seperate paper 
• Hand in if you've finished the test
• If you've handed in, you can do bettermarks

Quizizz

https://quizizz.com/admin/quiz/684171e1e926d869bbeeffab?at=6841726c36f1bc9583ec8a30