Clicker questions as your clue Grade 8 Math

What is the topic?

The most/least popular kind of music/sport/fast food-From Grade 8 St. Columba C.S.

What do you think is the most popular kind of music in this class?A. Classical MusicB. Rock MusicC. Metal MusicD. Hip-hop MusicE. Jazz

What do you think is the most popular kind of sport in this class?

A. FootballB. SoccerC. HockeyD. VolleyballE. Swimming

What do you think is the most popular kind of fast food in this class?A. McDonaldB. Burger KingC. Pizza PizzaD. KFCE. Subway

What is the topic for today?

A. Number SenseB. Data managementC. Patterning and AlgebraD. MeasurementE. Geometry and Spatial Sense

Review: Tally chartTally Chart: A method of counting

frequencies, according to some classification, in a set of data

Pet Tally Marks Number

Cat

Dog

Fish

Review: MeanMean:the mean of a set of numbers is

found by dividing the sum of the numbers by the number of numbers in the set

Mean= Sum of the numbers Number of numbers

Review: RatioRatio: a comparison of quantities with the

same units. A ratio can be expressed in ratio form or in fraction form; for example, 3:4 or ¾

-grade 8

Hands on activity

Activity: Textbook Page 90Gather cubes in two different waysDivide into 5 groupsA reporter from each groupIndividual: takes turn to repeats for 3 times

with two ways: hand up and hand downIndividual: fills in Tally chart and calculate the

numberIndividual: calculate means for your two waysGroup: fill in Mean and Ratio chartClass: guess which chart to use

-grade 8

Different types of graph

Graphs Graphs are pictures that help us

understand amounts. These amounts are called data. There are many kinds of graphs, each

having special parts.What are the elements of a graph?

GraphsTypeTitleLabels on the axesUnits for the scalesLegend

What type of graph is this?A. a bar graphB. a pictographC. a line graphD. a scatter plotE. a stem-and-leaf plotF. a circle graph

1st Qtr59%2nd

Qtr23%

3rd Qtr10%

4th Qtr9%

Sales

What type of graph is this?A. a bar graphB. a pictographC. a line graphD. a scatter plotE. a stem-and-leaf plotF. a circle graph Cate

gory

1

Catego

ry 2

Catego

ry 3

Catego

ry 4

048

12

Series 3Series 2Series 1

What type of graph is this?A. a bar graphB. a pictographC. a line graphD. a scatter plotE. a stem-and-leaf plotF. a circle graph Category 1

Category 2

Category 3

Category 4

0 1 2 3 4 5 6

Series 3Series 2Series 1

What type of graph is this?A. a bar graphB. a pictographC. a line graphD. a scatter plotE. a stem-and-leaf plotF. a circle graph 0.5 1 1.5 2 2.5 3

01234

Y-Values

Y-Values

What type of graph is this?A. a bar graph B. a pictographC. a line graphD. a scatter plotE. a stem-and-leaf plotF. a circle graph

What type of graph is this?A. a bar graphB. a pictographC. a line graphD. a scatter plotE. a stem-and-leaf plotF. a circle graph

Homework: page 911. Census or Sample?2. Which set of data match the circle

graph?3. How to interpret the graph to data?4. How to use stem-and-leaf plot?5. How to display data as a bar graph?6. what is the mean, median and mode?