02 - Scatter Graphs - Exam Qs

7/21/2019 02 - Scatter Graphs - Exam Qs

1/7

www.justmaths.co.uk JustMaths 2013

SCATTER GRAPHS

Name: _______________________

Total Marks: ___________

Q. Max Actual RAG

1 5

2 3

3 4

4 3

5 4

6 4


2/7


Q1. Rio wants to know the number of driving lessons he might need before

he passes his driving test.

He also wants to know the number of times he might have to take his

driving test before he passes.He collects some data and shows it on this scatter graph.

a) Rio ignores one of the points on the scatter graph. Circle this point and

give a reason why it should be ignored.

b)Draw a line of best fit on the scatter graph.

c) Rio has already failed his driving test three times after a total of 40 driving

lessons. Estimate how many more driving lessons Rio needs if he is to

pass his driving test on the fourth attempt.(5 Marks)


3/7


Q2. The scatter graph shows information about the height and the arm length

of each of 8 students in year 11.

a) What type of correlation does this scatter graph show?

A different student in year 11 has a height of 148 cm.b)Estimate the arm length of this student.

(3 Marks)


4/7


Q3. The scatter graph shows information about the height and weight for

nine students.

The table shows the height and the weight for three more students.

Height in cm 135 155 169

Weight in kg 70 75 85

a) On the scatter graph, plot the information from the table.

b)What type of correlation does this scatter graph show?

c) The weight of another student is 80 kg. Estimate the height of this

student.(4 Marks)


5/7


Q4. The scatter graph shows some information about 10 cars. It shows the

time, in seconds, it takes each car to go from 0 mph to 60 mph.

For each car, it also shows the maximum speed, in mph.

a) What type of correlation does this scatter graph show?

The time a car takes to go from 0 mph to 60 mph is 11 seconds.

b)Estimate the maximum speed for this car.

(3 Marks)


6/7


Q5. Mr Wither sells umbrellas.

The scatter graph shows some information about the number of

umbrellas he sold and the rainfall, in cm, each month last year.

In January of this year, the rainfall was 6.1 cm. During January, Mr

Wither sold 32 umbrellas.

a) Show this information on the scatter graph.

b)What type of correlation does this scatter graph show?

In February of this year, Mr Wither sold 40 umbrellas.

c) Estimate the rainfall for February.

(4 Marks)


7/7


Q6. On a particular day, a scientist recorded the air temperature at 8

different heights above sea level. The scatter diagram shows the air

temperature yoC, at each of these heights xkm, above sea level.

a) Using the scatter diagram, write down the air temperature recorded at

a height of 2.5 km above sea level.

b)Describe the correlation between the air temperature and the height

above sea level.

c) Find an estimate of the height above sea level when the air

temperature is 0

o

C.(4 Marks)

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02 - Scatter Graphs - Exam Qs