A temperature of -15 °F indicates a temperature that is how many degrees below zero?

The correct answer indicates that -15 °F is a temperature that is measured below zero degrees. The temperature scale, particularly Fahrenheit, assigns positive values to temperatures above the freezing point of water (32 °F) and negative values to values below freezing.

In this case, -15 °F explicitly indicates that the temperature is 15 degrees below the zero point on the Fahrenheit scale. Thus, -15 °F corresponds to 15 degrees below zero. This means that if you start at zero and count down to -15, you count 15 degrees down.

Understanding this concept of negative numbers on the thermometer can help in recognizing how to interpret temperatures accurately in practical situations, such as weather reporting.