Difference between revisions of "Scatter Graph"

Revision as of 07:57, 24 August 2018

A scatter graph is a graph that can be used to make predictions from an experiment.

Scatter graphs use x's to plot points on the graph.

A single line is drawn on a scatter graph called a line of best fit.

The variable you change in the experiment goes on the x-axis.

The variable you measure or count goes on the y-axis.

In this experiment a scientist watered 6 different pots of cress with different amounts of water each day to see how the amount of water affects the growth of cress.

Use the results table to find the highest number. (On this table it's 16).	Amount of water was chosen to it goes on the x-axis and the height of the stem goes on the y-axis. Add the numbers on the axes up to the highest number.

Plot the points on the graph using an X at each point.	Draw one straight line of best fit to the graph. We can use this line to predict how tall the stem would have grown if we'd given it 25ml of water each day.

@@ Line 24: / Line 24: @@
 | style="height:20px; width:400px; text-align:center;" |Plot the points on the graph using an X at each point.
 | style="height:20px; width:400px; text-align:center;" |Draw one straight [[Line of Best Fit|line of best fit]] to the graph.
+We can use this line to predict how tall the stem would have grown if we'd given it 25ml of water each day.
 |}