Choose axes from the variables, use most of the grid with an even scale, plot values and uncertainty accurately and support every interpretation with coordinates.
Fibres from the stems of hemp plants are widely used in industry for their great tensile strength.
The relationship between tensile strength and fibre diameter was investigated.
The photograph shows a cross section of a part of a hemp fibre and an eyepiece graticule. The fibre bundle is made up of pith cells, some of which are shown here.
The diagram shows apparatus that was used in an investigation to find the tensile strength of hemp fibres.
Some results from this investigation are shown in the table.
Plot a suitable graph of these results. Join the points with straight lines.