The temperature of a substance was recorded over several minutes, as shown in the graph below. The graph displays the linear relationship between the temperature (measured in degrees Celsius) and the number of minutes the substance was being observed.
X= Time (Minutes)
Y= Temperature (°C)
(0,2) and (8,12)
Which statement best describes the slope of the graph?
A . The temperature is increasing 3.25°C each minute.The temperature is increasing 3.25°C each minute.
B. The temperature is increasing 5.25°C each minute.The temperature is increasing 5.25°C each minute.
C. The temperature is increasing 1.25°C each minute.The temperature is increasing 1.25°C each minute.
D. The temperature is increasing 7.25° C each minute.
To determine the slope of the graph, we need to find the change in temperature divided by the change in time.
The change in temperature is 12 - 2 = 10°C.
The change in time is 8 - 0 = 8 minutes.
The slope of the graph is 10°C / 8 minutes = 1.25°C per minute.
Therefore, the correct statement is C. The temperature is increasing 1.25°C each minute.