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Maths (Higher)
Graphical representations of data: scatter graphs and time series

Starter quiz

  • Correlation describes the extent to which a relationship between two variables is close to a ______ relationship.
    • 'linear' ✓
  • Select the scatter graph which does not show an association between the two variables.
  • Which of these scatter graphs shows a negative correlation?
  • This scatter graph shows the value of a car and its age. The scatter graph shows <span class="blank">______</span> correlation.
    This scatter graph shows the value of a car and its age. The scatter graph shows ______ correlation.
    • 'negative' ✓
  • Lucas says, ‘A positive correlation means that one variable causes the increase in the other variable.” Is Lucas correct?
    • Yes, one variable is affecting the other.
    • Yes, correlation means one variable causes the other to increase.
    • No, one variable cause the other variable to decrease.
    • No, the increase in both variables might be caused by a third variable.  ✓
  • This scatter graph shows data taken from an gas supplier about energy bills and outside daily temperatures. Select the correct statement.
    This scatter graph shows data taken from an gas supplier about energy bills and outside daily temperatures. Select the correct statement.
    • As the mean gas bill increases, mean temperature decreases.
    • As the mean gas bill increases, mean temperature increases.
    • As temperature decreases, the mean gas bill decreases.
    • As temperature increases, the mean gas bill decreases.  ✓
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