For any given values, mark down the required d.p. (e.g. 3 d.p.)
Note the range of values they need you to find (underline)
Should the question mention gradient, write that the graph is a straight line
Tactical Entry
Draw the table for the graph (6 rows for straight line, 8 rows for curve (excluding headers))
Fill in the headers with proper units, e.g. , , where the format is
Write the required s.f. or d.p. on top of the headers
Fill in the independent variable column (should be the first one) with values of equal distance apart
Do experiments for each of the data
Collect all raw data first (e.g. , ) before beginning calculations
Once finish recording values, start bashing calculator (make sure to not enter the wrong value!)
Values should either have a increasing trend or decreasing trend (if straight line graph)
If there is a question on calculating the values for the first iteration of the experiment, skip it and do it later after all data is collected
Do question on measurements asap when the caliper/micrometer screwgauge is available
Graph
Must label X and Y axis
No need to start from 0 origin
Use sensible scale for X axis (the range of values is alr given, shld typically stretch the entire width of the graph paper (or at least a sizable portion))
For vertical axis, look at min and max values of your experiment and scale accordingly
Best fit line just draw best fit, overlay with ruler to check before drawing
Find precision of graph, take value of 1 square/20, mark on graph
For gradient calculation, use FRESH NEW POINTS
Draw gradient triangle
Label points used for gradient calculation, use CORRECT D.P.
Calculations
Gradient
Calculate for Unknown
Find term that describes gradient
Find x term
Find y term
Take term that describes gradient and plug into gradient value