All the solutions provided inÂ **McGraw Hill My Math Grade 2 Answer Key PDF Chapter 9 Review **will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 2 Chapter 9 Review Answer Key

**Vocabulary Check**

data

survey

tally marks

picture graph

line plot

bar graph

**Write the correct word in each blank.**

Question 1.

You can collect data by asking people the same question in a ________________.

Answer: survey

Explanation:

You can collect data by asking people the same question in a survey.

Question 2.

A ________________ uses bars to show data.

Answer:Â bar graph

Explanation:

A graph that uses bars to show data is Bar graph

Question 3.

Numbers or symbols that show information are called ______________.

Answer: data

Explanation:

Numbers or symbols that show information is Data

Question 4.

A ______________ shows how often a certain number occurs in data.

Answer:Â Line plot

Explanation:

A graph used to show how often a certain number occurs in data is Line plot

Question 5.

A _______________ uses pictures to show information collected.

Answer:Â picture graph

Explanation:

A graph that has different pictures to show information collected is Picture graph

Question 6.

A _________________ is a mark used to record data collected in a survey.

Answer:Â tally marks

Explanation:

Marks used in a survey to collect data is Tally marks.

**Concept Check**

**Use the tally chart to make a picture graph.**

Question 7.

Answer:Â The detailed votes are given below.

Explanation:

Base ball got 4 votes

Football got 4 votes

Hockey got 2 votes

Volleyball got 3 votes.

**Use the picture graph above to complete the sentences.**

Question 8.

How many students were surveyed?

Answer: 13 students got surveyed

Explanation:

Base ball got 4 votes

Football got 4 votes

Hockey got 2 votes

Volleyball got 3 votes.

So, 13 students got surveyed

Question 9.

How many students like hockey and football?

Answer: 5 students like hockey and football

Explanation:

Base ball got 4 votes

Football got 4 votes

Hockey got 2 votes

Volleyball got 3 votes.

So, 5 students like hockey and football.

**Use the tally chart to make a bar graph.**

Question 10.

Answer: The bar graph below shows the votes

Explanation:

Yes got 10 votes

No got 1 votes

**Use the bar graph above to complete the sentences.**

Question 11.

How many students have been to the zoo?

Answer: 11 students have been to the zoo

Explanation:

From the bar graph above,

Yes got 10 votes

No got 1 votes

So, 11 students have been to the zoo

Question 12.

How many more students have been to the zoo than have not been to the zoo?

Answer: 10 more students have been to the zoo than have not been to the zoo

Explanation:

From the bar graph above,

Yes got 10 votes

No got 1 votes

So, 10 more students have been to the zoo than have not been to the zoo

**Problem Solving**

Question 13.

Taylor asked 12 friends to name their favorite number. Five friends said 4. Six friends said I. One friend said 2. Use Taylorâ€™s data to complete the line plot.

Answer: The complete line plot is given below.

Explanation:

Given, Taylor asked 12 friends to name their favorite number.

Five friends said 4. Six friends said I. One friend said 2.

Question 14.

A tricycle has 3 wheels. How many wheels are there on 4 tricycles?

_____________ wheels

Answer: 12 wheels are there on 4 tricycles

Explanation:

Given,

A tricycle has 3 wheels.

For 4 tricycles , 3 Ă— 4 = 12

So, 12 wheels are there on 4 tricycles

**Test Practice**

Question 15.

There are 4 giraffes at the zoo. Each giraffe has 4 legs. How many legs are there in all?

(A) 2

(B) 4

(C) 8

(D) 16

Answer: D

Explanation:

Given, There are 4 giraffes at the zoo.

Each giraffe has 4 legs.

4 Ă— 4 = 16

So, There are 16 legs in all.

**Reflect**

**Show how to record and analyze data.**

Complete the tally chart.

Answer:

Explanation:

Banana got 5 votes

Apple got 4 votes

Orange got 3 votes.

Use the tally chart to make a picture graph.

Answer:

Explanation:

Banana got 5 votes

Apple got 4 votes

Orange got 3 votes.

Use the tally chart to make a bar graph.

Answer:Â

Explanation:

Banana got 5 votes

Apple got 4 votes

Orange got 3 votes.

Analyze the data.

How many people like apples and bananas?

Answer: 9 people like apples and bananas

Explanation:

Banana got 5 votes

Apple got 4 votes

Orange got 3 votes.

So, 9 people like apples and bananas.