Skip to main content

About this free course

Download this course

Share this free course

Diagrams, charts and graphs
Diagrams, charts and graphs

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

3.4.1 Try some yourself

Activity 22

Write down the coordinates of the point P on each of the graphs below and interpret these coordinates in terms of the labels on the axes.

Graph (a)
Graph (b)
Graph (c)

Answer

  • (a) (12.00, 30). This means that the temperature at midday was 30°C.

  • (b) (9.5, 10). At 9.30 a.m. the temperature was 10°C.

  • (c) (24, −60). On the 24th of the month there was −£60 in the bank (that is, the account was overdrawn by £60).

Activity 23

Choose the most suitable axes and plot the following sets of points:

  • (a) (2, 10), (4, 38), (7, 26), (5, 23);

This element is no longer supported and cannot be used.
  • (b) (350, 150), (420, 168), (630, 172), (570, 159);

This element is no longer supported and cannot be used.
  • (c) (140, 6), (−100, 30), (60, 13), (−60, 22).

This element is no longer supported and cannot be used.

Activity 24

Summarise the information given by the graph below.

Answer

The cost of coffee increased over the period from £5 per kilogram to over £10 per kilogram. It remained more or less steady between February and April, rose significantly during the month of April, then increased slowly but steadily until July.

Activity 25

Draw a graph on graph paper based on the data in this table. What shape is your graph?

Click on the link below for a graph paper PDF to print and use.

Graph Paper [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)]

Length of bus journey/km0.511.522.533.54
Cost/£1.201.281.321.421.501.621.691.86

Answer

Again, the size of the graph paper and the scales used will have an effect, but your graph should resemble the one below. The graph is approximately a straight line.