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The mean temperature for the first 4 days in january was 7°c. the mean temperature for the first 5 days in january was 5°c. what was the temperature on the 5th day?

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?