Final answer:
The temperature increased by 12°F when it went from -4°F to 8°F. This is calculated by finding the difference between the final and initial temperatures, resulting in a positive change of 12 degrees.
Step-by-step explanation:
To calculate how many degrees the temperature increased when it went from -4°F to 8°F, we can set up the following algebraic equation:
Let T represent the increase in temperature. Then, we can write T = Final Temperature - Initial Temperature, which translates to T = 8°F - (-4°F).
Solving this equation yields:
T = 8°F + 4°F
T = 12°F
Therefore, the temperature increased by 12 Fahrenheit degrees.