The table below shows the average temperature, in degrees Celsius, in Jacob's city over a period of five months:

Month 1 2 3 4 5
Temperature 5 7.2 9.4 11.6 13.8


Did the temperature in Jacob's city increase linearly or exponentially?

Linearly, because the table shows a constant percentage increase in temperature each month
Exponentially, because the table shows a constant percentage increase in temperature each month
Linearly, because the table shows that temperature increased by the same amount each month
Exponentially, because the table shows that temperature increased by the same amount each month