Scatter diagrams & lines of best fit
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1 Name: Scatter diagrams & lines of best fit Date: Time: 59 minutes Total marks available: 59 Total marks achieved: L. Warwicker
2 Questions Q1. The table shows the average temperature on each of seven days and the number of units of gas used to heat a house on these days. (a) Complete the scatter graph to show the information in the table. The first 5 points have been plotted for you. (b) Describe the relationship between the average temperature and the number of units of gas used (c) Estimate the average temperature on a day when 12 units of gas are used.... C
3 Q2. The scatter graph shows information about 8 people. It shows each person's height and the circumference of their head. The table gives this information for 2 other people. Height (cm) Circumference of head (cm) (a) On the scatter graph, plot the information from the table. (b) Describe the correlation. (c) Draw a line of best fit on your scatter graph. (d) Estimate the circumference of the head of a person who is 156 cm tall cm
4 Q3. A car company records the number of miles cars of different engine sizes, in litres, travel using one gallon of fuel. The scatter graph shows this information. Another car has an engine size of 1.8 litres and travels 42 miles using one gallon of fuel. (a) Plot this information on the scatter graph. (b) What type of correlation does this scatter graph show? (c) Draw a line of best fit. A car has an engine size of 2.8 litres. (d) Find an estimate for the number of miles this car travels using one gallon of fuel.
5 Q4. Carlos has a cafe in Clacton. Each day, he records the maximum temperature in degrees Celsius ( C) in Clacton and the number of hot chocolate drinks sold. The scatter graph shows this information. On another day the maximum temperature was 6 C and 35 hot chocolate drinks were sold. (a) Show this information on the scatter graph. (b) Describe the relationship between the maximum temperature and the number of hot chocolate drinks sold (c) Draw a line of best fit on the scatter diagram. One day the maximum temperature was 8 C. (d) Use your line of best fit to estimate how many hot chocolate drinks were sold....
6 Q5. A publisher checks documents for errors. He records the number of documents that are checked each day. He also records the total number of errors in the documents each day. The scatter graph shows this information. On another day 90 documents are checked. There is a total of 17 errors. (a) Show this information on the scatter graph. (b) Describe the correlation between the number of documents checked and the total number of errors.... One day 110 documents are checked. (c) Estimate the total number of errors in these documents....
7 Q6. The scatter graph shows information about 10 apartments in a city. The graph shows the distance from the city centre and the monthly rent of each apartment. The table shows the distance from the city centre and the monthly rent for two other apartments. Distance from the city centre (km) Monthly rent ( ) (a) On the scatter graph, plot the information from the table. (b) Describe the relationship between the distance from the city centre and the monthly rent. An apartment is 2.8 km from the city centre. (c) Find an estimate for the monthly rent for this apartment.
8 Q7. Mr Kent's students did a maths test and a science test. The scatter graph shows the marks of 12 of these students. The table shows the marks of two more students. Name maths science Masood Nimer (a) Show this information on the scatter graph. (b) What type of correlation does this scatter graph show? David did the maths test. He was absent for the science test. David's mark in the maths test was 15 (c) Estimate a science mark for David.
9 Q8. The scatter graph shows information about the ages and values of seven Varley motor scooters. Another Varley motor scooter is 5 years old. It has a value of 300 (a) Show this information on the scatter graph. (b) Describe the relationship between the age and the value of Varley motor scooters. A Varley motor scooter is 4 years old. (c) Estimate its value.
10 Q9. A beach cafe sells ice creams. Each day the manager records the number of hours of sunshine and the number of ice creams sold. The scatter graph shows this information. On another day there were 11.5 hours of sunshine and 73 ice creams sold. (a) Show this information on the scatter graph. (b) Describe the relationship between the number of hours of sunshine and the number of ice creams sold. One day had 10 hours of sunshine. (c) Estimate how many ice creams were sold.
11 Q10. The scatter graph shows some information about 10 cars, of the same type and make. The graph shows the age (years) and the value ( ) of each car. The table shows the age and the value of two other cars of the same type and make. (a) On the scatter graph, plot the information from the table. (b) Describe the relationship between the age and the value of the cars. A car of the same type and make is 2½ years old. (c) Estimate the value of the car.
12 Q11. 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....cm (Total for Question is 3 marks)
13 Q12. The scatter graph shows some information about 8 cars. For each car it shows the engine size, in litres, and the distance, in kilometres, the car travels on one litre of petrol. (a) What type of correlation does the scatter graph show? A different car of the same type has an engine size of 2.5 litres. (b) Estimate the distance travelled on one litre of petrol by this car kilometres (Total for Question is 3 marks)
14 Q13. Some children took part in a piano competition. Each child was given a mark from Judge A and from Judge B. The scatter graph below shows some of this information. (a) Describe the correlation. Judge A gives 44 marks to another child. (b) Use the scatter graph to estimate Judge B's mark for this child. (Total for Question is 3 marks)
15 Q14. The scatter graph gives information about the rainfall (mm) and the number of umbrellas sold in a shop for each of eight months last year. (a) Describe the relationship between the rainfall and the number of umbrellas sold In a different month, the rainfall was 28 mm. (b) Estimate the number of umbrellas sold in the shop that month.... (Total for Question is 3 marks)
16 Q15. The scatter graph shows information about 10 newborn babies. It shows each baby's body length and head circumference. Another baby has a body length of 47 cm and head circumference 34 cm. (a) Show this information on the scatter graph. (b) What type of correlation does the scatter graph show?... A baby has head circumference 35 cm. (c) Estimate the body length of this baby.... cm (Total for question = 4 marks)
17 Q16. The scatter graph shows some information about ten pine cones from the same tree. It shows the length and the width of each pine cone. (a) Describe the relationship between the length and the width of a pine cone Another pine cone from this tree has a length of 8.4 cm. (b) Estimate the width of this pine cone....cm (Total for question = 3 marks)
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Name Date Class 1-1 Graphing Linear Equations Write the correct answer. 1. The distance in feet traveled by a falling object is found by the formula d = 16t where d is the distance in feet and t is the
19 Oliver records the distance from London to each of eight cities in the USA.
DO NOT WRITE IN THIS RE DO NOT WRITE IN THIS RE DO NOT WRITE IN THIS RE DO NOT WRITE IN THIS RE DO NOT WRITE IN THIS RE DO NOT WRITE IN THIS RE Title: Mock Set 3 Paper 2H Date: 1. Oliver records the distance
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2. Tell which graph corresponds to person 1 in Table 1-9.2b above.
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Name Class Date. Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved. Travels in Air. Distance (miles) Time (seconds)
Practice - Rate of Change and Slope Find the slope of each line.... O O O Find the slope of the line that passes through each pair of points.. (, ), (7, 5) 5. (8, ), (, ). (, 5), (, 7) 7. (-, 7), (, -)
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Instructions Use black ink 7C or ball-point pen. Fill in the boxes at the top of this page with your name, centre number and candidate number. Answer all questions. Answer the questions in the spaces provided