20.5 line graphs

Question 1

An online store records the number of sales they have over the course of 6 days.

 

Using this information the store owner plots a line graph.

 

Select the correct plot from the list below:

Answer:

 

A: 

B:

C:

D:

 

 

WORKED SOLUTION:

Correct answers:  A

 

Correctly plot each data point then connect by drawing a straight line between each consecutive points

Question 2

A student records the total amount of money spent each month.

 

They plot the data on a line graph.

 

How much did they spend in June?

 

Select the correct answer from the list below:

Answer:

 

A: £195

B: £125

C: £210

D: £180

 

 

WORKED SOLUTION:

Correct answers:  A

 

Tracing up from June on the x-axis until we reach the line then across to the y-axis we find that the student spent £195 in June

 

Question 3

The average temperature for Scotland in November is displayed in the table below.

 

The national weather agency plots the data on a line graph.

 

Which graph correctly represents this data?

 

Select the correct answer from the list below:

Answer:

 

A: 

B: 

C: 

D: 

 

 

WORKED SOLUTION:

Correct answers:  A

 

Correctly plot each data point then connect by drawing a straight line between each consecutive point. We can quickly rule out B as the first data point is below 4 \degree \text{C} and we can rule out B & C as the graphs do not show the dip during 2018 that is present in the data.

Question 4

A café records the number of customers that order a coffee each day before 10 am.

The café owner plots a line graph as shown.

 

What was the total number of customers that bought coffee on Wednesday and Friday combined?

 

Select the correct answer from the list below:

Answer:

 

A: 27

B: 26

C: 25

D: 28

 

Correct answers:  A

WORKED SOLUTION:

 

Reading off the graph, there were 10 customers on Wednesday and 17 on Friday that bought coffee.

Therefore, in total for both of these days there were 10+17=27 customers.

Question 5

The population of a small village changes year on year.

A resident records the total population at the start of each year and plots this data as shown.

 

 

 

Use the information graph provided to estimate the population of the village midway through 2018.

Select the correct answer from the list below:

Answer:

 

A: 6000

B: 5200

C: 6400

D: 5500

 

 

WORKED SOLUTION:

Correct answers:  A

Tracing up from halfway between 2018 and 2019 on the x-axis until reaching the line at approximately 6000 people.