Clicking on the end of a vector will also reveal its individual components. You can drag the diagram around and zoom in or out by scrolling with the mouse.
Of the diagram will automatically adjust to fit the magnitude of the vectors). Clicking the draw button will then display the vectors on the diagram (the scale In these lines to show the examiner how you reached your answer.The demo above allows you to enter up to three vectors in the form (x,y,z). Predict what a pair of values in the experiment would probably
This can be done from any value on either axis and allow you to The other axis after it has reached your graph line of best fit. You canĭraw a line parallel to one of the axes and then direct it towards You have drawn can be used to make predictions. Think of how these anomalies could have occurred or what you could They are probably due to experimental error. That are well away from the line are called anomalies. Line goes through the origin the graph indicates that theyĪre directly proportional. Graph gives you a straight line it shows that the two physical 'bumps' or 'wiggles'! Interpreting your graph no 'bumps' or 'wiggles'!Ī straight line should be drawn with a ruler, not freehandīe drawn in a smooth 'swoop' through the points to indicate Your line gives an indication of the trend that they follow. It obliterates the point you can still see where it is.Īppropriate best fit curved or straight line graph (NOTĭOT-TO-DOT graphs) to fit the data, Your points are NOT perfect. The axes with the physical quantity and the unit Put a key (explaining what each colour of line represents) if you choose to display more than one set of results on a single graph. Ice' explains what you were doing as you recorded temperature that canīe gleaned from the labels on the axes. Not simply 'A graph of temperature against time'. Graph a title that explains what the experiment was about,
Choose factors of 2 or 5 NOT 3 or 7, or any other awkward number. (ii) divisions on the axes make it easy to plot the points accurately. In ink and if you wish go over your points in ink or in a fine-tipped Such a graph does not indicate the precision of your results so it can be a good idea to include BOTH types of graph in a practical report - it gives you more to comment on in the results section.Īnd then when you are happy with it label the axes in ink, add a title Sometimes examiners just want you to plot a single point for each measurement - then you need to plot your average result for that value. Accuracy relates to how correct your results are - not your ability to get the same answer each time! Plotting the spread of the results on the graph helps you to identify precision - not accuracy. The graph above helps you to see the data gives you a general trend of direct proportionality and makes the ringed result stand out as an anomaly. Graph, you can also see the 'spread' the results and tell at a glance You can instantly see the 'trend' of your resultsĪnd if you plot each set of data in a different colour on the same
To plot a 'best fit' line graph - a line graph can be a straight line or a curved line.Īt data from a table. Line Graphs help you to see how two continuous variables relate Up of various entities - to see the proportion of the contributions. Pie charts help you to see how the 'whole' is made It is for displaying categoric variables. There are lots of different types of graph:īar charts help you to see how two or more separateĮntities (such as grades, years, different metals, animals, fish,Ĭountries) compare to each other.
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