Plot the data from Table 6 on the graph paper. Draw a line of best fit.<br/><br/>Table 6<br/><br/>| Mass of ammonium nitrate (g) | Lowest temperature (°C)
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<div style="font-family: sans-serif; max-width: 600px;"> <table style="width: 100%; border-collapse: collapse; border: 1px solid black; text-align: center;"> <thead> <tr style="background-color: #f9f9f9;"> <th style="border: 1px solid black; padding: 12px;">Mass of ammonium nitrate added in grams</th> <th style="border: 1px solid black; padding: 12px;">Lowest temperature of solution in °C</th> </tr> </thead> <tbody> <tr><td style="border: 1px solid black; padding: 10px;">4.0</td><td style="border: 1px solid black; padding: 10px;">18.2</td></tr> <tr><td style="border: 1px solid black; padding: 10px;">8.0</td><td style="border: 1px solid black; padding: 10px;">16.2</td></tr> <tr><td style="border: 1px solid black; padding: 10px;">12.0</td><td style="border: 1px solid black; padding: 10px;">15.2</td></tr> <tr><td style="border: 1px solid black; padding: 10px;">16.0</td><td style="border: 1px solid black; padding: 10px;">13.6</td></tr> <tr><td style="border: 1px solid black; padding: 10px;">20.0</td><td style="border: 1px solid black; padding: 10px;">12.4</td></tr> <tr><td style="border: 1px solid black; padding: 10px;">24.0</td><td style="border: 1px solid black; padding: 10px;">10.6</td></tr> </tbody> </table> </div>

How to approach this question

1. For each pair of data points in the table, plot a point on the graph. The mass is the x-coordinate and the temperature is the y-coordinate.\n2. Use a small, neat cross (x) or a point with a circle around it (⊙) for each point.\n3. Once all points are plotted, assess the trend. The points should form a roughly straight line.\n4. Draw a single straight line using a ruler that goes through or as close as possible to all the points. The line should have roughly the same number of points on either side of it. Do not connect the dots.

Full Answer

To plot the graph:\n- The independent variable (mass) goes on the x-axis, and the dependent variable (temperature) goes on the y-axis.\n- Each pair of values from the table is plotted as a coordinate (x, y). For example, (4.0, 18.2), (8.0, 16.2), etc.\n- The points should be marked clearly.\n\nTo draw the line of best fit:\n- Observe that the points lie approximately on a straight line.\n- Use a ruler to draw a single straight line that passes as close as possible to all the plotted points.\n- The line should balance the points, with some above and some below the line, or all points lying on the line.\n- The line should not be forced to go through the origin (0,0) unless the data suggests it should.

Common mistakes

✗ Plotting points inaccurately.\n✗ Joining the dots instead of drawing a line of best fit.\n✗ Drawing a line that does not represent the trend of the points.

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