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Use what you know to convert.35 km/hr to m/min. Graphing in Physics.
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Transcript of Use what you know to convert.35 km/hr to m/min. Graphing in Physics.
• Use what you know to convert .35 km/hr to m/min
Graphing in Physics
Graphing
• A way to display data that is collected in an experiment.
• They must be constructed accurately and neatly so data is understood.
• Three main types of graphs: line, pie and bar.
4 parts of a graph1. Title & Axis
labels
2. Independent variable
3. Dependent variable
4. Scales for variable
Parts of the GraphTitle- – A statement placed
above the graph to help explain the graph.
Axis labels – give units and
description of data on each axis (side) of graph
A graph is incomplete if the title and axis labels are missing.
Parts of a Graph• The Independent Variable-
–The ONE thing in the experiment that is controlled by the experimenter.
–It usually concerns time, depth, or temperature.
–It is on the horizontal or x-axis.
Parts of a Graph• Dependent Variable
– is the variable that is directly affected by the changes in the independent variable.
–Examples of possible dependent variables: • Student grades, salary earned, number of
assignments completed
–This variable is placed on the vertical or Y-axis.
Parts of a Graph• Scales for each variable-
– In order to plot a graph you must set a scale to include all the data points.
– Scales will start at 0 and climb in equal intervals such as 2,5,10 etc.
– The scales for the x and y axis can be different. – Set the scale so that the entire space provided
is used• You want the graph to be spaced out so it is easier to
read and understand
Graphing Scientific Data • Instead of connecting the points “dot-to-
dot” style, draw in a line of best fit– a line that goes through most of the points,
but not all of them
Graphing Scientific Data • Lines of best fit allow for interpolation and extrapolation of
the data presented• Interpolation- used to approximate values that are between
data points on the graph
• Extrapolation- used to approximate values beyond the range of the data