1. Example of a line of best fit y
Year 8 Graphs
Example of a line of best fit
Line graph
The type draw of graph we normally draw in science. Consists of small crosses joined with a straight or curved line
Y axis
The vertical scale up the side of a graph
X axis
The horizontal scale on a graph
Origin
The point on the graph where the x and y scale starts i.e. zero
Directly proportional
This describes a straight line graph going the origin
Anomaly
A piece of data which doesn’t fit the pattern of results
Line of best fit
A straight or curved line which best fits the pattern of the data. It will go through most of the data points but except for anomalies
Gradient
The steepness of a line
Time
Volume of gas produce by reaction y
Anomaly x
Example of a description
As the amount of pesticide increases the thickness of the eggshell increases gradually. However, after a certain amount the thickness starts decreasing rapidly and in a straight line.
Describing graphs
Useful words for describing graphs: increase, decrease, straight, curved, flat, steep, gradually, quickly, directly proportional
Tip for describing graphs: Divide the graph into sections where the pattern changes. Then describe each section separately.