Example 2: The table below shows the thermostat setting (in units called gas marks) on a British gas oven and the
corresponding temperature in degrees Celsius.
2
2
3
4
8
Setting
(gas mark)
Temperature
(°C)
150
160
180
190
200
220
230
1. Create a scatter plot on the right, Is there positive or
negative correlation?
2. Write the equation of a line of best fit. Show all work.
Temperature (C)
3. Graph your equation against the scatter plot. There should
be approximately as many points above the line as below.
0
1
8 x
4. Predict the temperature when the thermostat is set at 12.
Show your set-up. You may use a calculator for calculations,
2 3 4 5 6 7
Setting (gas mark)