n a recent survey, a magazine reported that the preferred room temperature in the summer is 68°F. A wall thermostat, like the ones shown below, tells a room's temperature in degrees Fahrenheit Sarah's Upstairs Bedroom Downstairs Bedroom 72°F 64°F a. Which bedroom is warmer than the recommended room temperature?

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ISBN:9780470458365
Author:Erwin Kreyszig
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In a recent survey, a magazine reported that the preferred room temperature in the summer is 68°F. A
wall thermostat, like the ones shown below, tells a room's temperature in degrees Fahrenheit
Sarah's Upstairs Bedroom
Downstairs Bedroom
72°F
64°F
a.
Which bedroom is warmer than the recommended room temperature?
b.
Which bedroom is cooler than the recommended room temperature?
c. Sarah notices that her room's temperature is 4°F above the recommended temperature, and
the downstairs bedroom's temperature is 4°F below the recommended temperature. She
graphs 72 and 64 on a vertical number line and determines they are opposites. Is Sarah
correct? Explain.
d. After determining the relationship between the temperatures, Sarah now decides to represent
72°F as 4 and 64°F as -4 and graphs them on a vertical number line. Graph 4 and -4 on the
vertical number line on the right. Explain what zero represents in this situation.
EUREKA
MATH
Lesson 4:
The Opposite of a Number
O 2019 Great Minds. eureka-math.org
Transcribed Image Text:In a recent survey, a magazine reported that the preferred room temperature in the summer is 68°F. A wall thermostat, like the ones shown below, tells a room's temperature in degrees Fahrenheit Sarah's Upstairs Bedroom Downstairs Bedroom 72°F 64°F a. Which bedroom is warmer than the recommended room temperature? b. Which bedroom is cooler than the recommended room temperature? c. Sarah notices that her room's temperature is 4°F above the recommended temperature, and the downstairs bedroom's temperature is 4°F below the recommended temperature. She graphs 72 and 64 on a vertical number line and determines they are opposites. Is Sarah correct? Explain. d. After determining the relationship between the temperatures, Sarah now decides to represent 72°F as 4 and 64°F as -4 and graphs them on a vertical number line. Graph 4 and -4 on the vertical number line on the right. Explain what zero represents in this situation. EUREKA MATH Lesson 4: The Opposite of a Number O 2019 Great Minds. eureka-math.org
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