Grade 12 Maths · Statistics · Paper 2

Scatter Plots Grade 12

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Question 2.1 · May/June 2025 · Paper 2 · National (DBE) · 3 marks

The manager of a supermarket decided to do a survey on the number of items that a customer ordered online and the time (in minutes) that a packer took to have the order ready for delivery.

The supermarket received

10

online orders on a certain day. The information for these

10

orders is shown below.

Number of items (x): 10, 3, 20, 14, 17, 9, 12, 18, 15, 19
Time (in minutes) (y): 5, 5, 9, 7, 6, 6, 8, 11, 10, 12

2.1 Draw a scatter plot on the grid provided in the ANSWER BOOK.(3) Diagram for question 2.1

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More Scatter Plots Grade 12 questions and answers

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4. Question WE7 · Siyavula Grade 12 Mathematics, 9.2 Curve fitting, Worked example 7 · 3 marks
$Diagram for this question$
WE7 Using a calculator, find the equation of the least squares regression line for the following data:(3)
Show the memo (3 ticks)Memo
1. ✓
  aEnter the five $(x; y)$ pairs in statistics (regression) mode and recall $a$ : $a = 0, 9$
  1 mark · Find the regression line
2. ✓
  bRecall $b$ : $b = 0, 55$
  1 mark · Find the regression line
3. ✓
  Equation $∴ \overset{y}{^} = 0, 9 + 0, 55 x$
  1 mark · Find the regression line
5. Question a · Siyavula Grade 12 Mathematics, 9.2 Curve fitting, Worked example 8 · 3 marks
The Chemistry and Accounting marks of five learners are given in the table. $Diagram for this question$
a Using a calculator determine the least squares line of best fit for the data set.(3)
Show the memo (3 ticks)Memo
1. ✓
  a $a = - 5, 065 \dots = - 5, 07$ (to two decimal places)
  1 mark · Find the regression line
2. ✓
  b $b = 1, 169 \dots = 1, 17$ (to two decimal places)
  1 mark · Find the regression line
3. ✓
  Equation $\overset{y}{^} = - 5, 07 + 1, 17 x$
  1 mark · Find the regression line
6. Question b · Siyavula Grade 12 Mathematics, 9.3 Correlation, Worked example 9 · 3 marks
A cardiologist wanted to test the relationship between resting heart rate and the peak heart rate during exercise. Heart rate is measured in beats per minute (bpm). The following set of data was generated from $12$ study participants after they had run on a treadmill at $10 km/h$ for $10$ minutes. $Diagram for this question$
b Use your calculator to determine the equation of the line of best fit.(3)
Show the memo (3 ticks)Memo
1. ✓
  a $a = 86, 75$
  1 mark · Find the regression line
2. ✓
  b $b = 0, 96$
  1 mark · Find the regression line
3. ✓
  Equation $y = 86, 75 + 0, 96 x$
  1 mark · Find the regression line
7. Question b · Siyavula Grade 12 Mathematics, 9.2 Curve fitting, Worked example 4 · 1 mark
Examine the scatter plot below of data collected from a new shop: $Diagram for this question$
b What type of function best fits the data?(1)
Show the memo (1 tick)Memo
1. ✓
  Function typeThe data fit an exponential function.
  1 mark · Choose the best-fitting curve

Scatter Plots Grade 12 videos

Short lessons from South African teachers first. Videos load only when you tap play, to save your data.

Plotting Points on a Coordinate Plane | All 4 QuadrantsMath with Mr. J

Straight line graphs grade 9: DrawKevinmathscience

6. Grade 11 Mathematics - Statistics - Skewed DataJuniorTukkie at the University of Pretoria

Statistics Grade 12 : line of best fitKevinmathscience

4. Grade 12 Mathematics - Statistics - Correlation between VariablesJuniorTukkie at the University of Pretoria

Statistics Grade 12 : line of best fit practiceKevinmathscience

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