You work at an ice cream shop. When you get to work, the temperature of the freezer is –3ºF. You notice the temperature is now 6ºF. How much did the temperature increase?

To find the increase, subtract the starting temperature from the new temperature: 6 − (−3) = 6 + 3 = 9. The temperature increased by 9º, so the correct choice is E, 9º.

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