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heating Water The temperature of water in a heating tea ket- tle rises according to the equation y = 30 x + 72, where y

heating Water The temperature of water in a heating tea ket- tle rises according to the equation y = 30x + 72, where y is the temperature (in degrees Fahrenheit) x minutes after the kettle was put on the burner.

(a) Whatphysicalinterpretationcanbegiventothey-intercept of the graph?

(b) What will the temperature of the water be after 3 minutes?

(c) After how many minutes will the water be at its boiling

point of 212?

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