Question

today’s high temperature is 72°f. if yesterday’s high temperature was 87°f, what was the change in high temperatures?
-19°f
19°f
15°f
-15°f

Explanation:

Step1: Identify the formula for temperature change

The change in temperature is calculated by subtracting yesterday's temperature from today's temperature. So the formula is \( \text{Change} = \text{Today's Temperature} - \text{Yesterday's Temperature} \).

Step2: Substitute the given values

Today's temperature is \( 72^\circ\text{F} \) and yesterday's temperature is \( 87^\circ\text{F} \). Substituting these values into the formula, we get \( \text{Change} = 72 - 87 \).

Step3: Perform the subtraction

Calculating \( 72 - 87 \), we know that \( 72 - 87 = -15 \). So the change in temperature is \( -15^\circ\text{F} \).

Answer:

\(-15^\circ\text{F}\) (corresponding to the option with \(-15^\circ\text{F}\))