📈 Reading points

Reading a point

On a line graph, each point shows one reading. To read it:

1. Find the time (or label) along the bottom.
2. Go up to the point.
3. Go across to the scale on the side and read the value.

In week 3 the point is halfway between 30 and 40, so the sunflower was 35 cm tall.

What the line tells you

• Line going up: the amount is increasing
• Line going down: it is decreasing
• Line flat: no change
• Steepest part: the biggest change between two points

Finding a change

How much did it grow from week 1 to week 4? 50 − 10 = 40 cm

Watch out! Check what the scale goes up in, and whether it starts at 0. Some graphs start higher to save space.

Top tip: to find when something changed the most, work out the difference between each pair of points next to each other.