The temperature at which water starts to boil is called its boiling point and is linearly related to the altitude. Water boils at 212°F at sea level and at 193.6°F at an altitude of 10,000 feet. (a) Find a relationship of the form T = mx + b where T is degrees Fahrenheit and x is altitude in thousands of feet. (b) Find the boiling point at an altitude of 4,300 feet. (c) Find the altitude if the boiling point is 197.5°F. (d) Graph T and illustrate the answers to (b) and (c) on the graph. (a) Choose the correct relationship below. O A. T = 1.84x+212 O B. T = 1.84x +212 O C. T = 1.84x-212 O D. T= 1.84x - 212

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