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Lesson · Grade 6 · Mathematics

Reading and Drawing a Line Graph

  • Grade 6
  • Mathematics
  • 1 min 16 s
  • British Columbia
  • BC6-MA-43

A table of a bean plant's height over six weeks becomes a line graph, step by step: axes, a scale counting by 2s, a title, a point for each row, and straight lines joining the points in order. The graph is then read: week 5 shows 12 cm, and the steepest part, from week 3 to week 4 (10 − 6 = 4 cm), shows when the plant grew the most.

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In one sentence

The question this lesson answers

This table shows the height of a bean plant, measured each week.

When did the plant grow the most?

Transcript

What the lesson says

This table shows the height of a bean plant, measured each week.

When did the plant grow the most?

To draw a line graph, put the weeks across the bottom and the height up the side.

The heights reach 14 centimetres, so count up the side by 2s.

Give the graph a title that says what it shows.

In week 1 the plant was 2 centimetres tall, so go across to 1 and up to 2.

Plot the other rows the same way, across and then up.

Join the points in order with straight lines.

To read the graph, go up from week 5 to the line, then across to 12 centimetres.

Most weeks, the line goes up 2 centimetres.

The line is steepest from week 3 to week 4, going from 6 to 10 centimetres.

So it grew the most between week 3 and week 4: 10 minus 6 is 4 centimetres.

A line graph joins points in order to show how something changes over time.

Curriculum

Where this fits

British Columbia, Grade 6

Mathematics, Data and probability: line graphsBC6-MA-43

Next: Theoretical Probability: List Every Outcome

The outcomes and strands follow the British Columbia curriculum.

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