Answer:
The correct graph is attached below.
Step-by-step explanation:
Given:
Initial temperature is 0°.
Decrease in temperature per hour is 12°.
Since, the initial temperature is 0°, the line must pass through the origin as temperature is plotted along the y-axis.
Also, decrease in temperature per hour is 12°. So, this represents the slope of the line. So, the slope should be -12 as there is decrease in temperature with increasing time.
So, the correct graph will be a line passing through origin and the slope of the line must be -12. Also, the temperatures will be along the negative y-axis as the values are decreasing with time.
Hence, the third graph is the correct one and is shown below.
