Identifying Aspects of Quadratic Functions
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Which is a quadratic function having a leading coefficient of 3 and a constant term of -12?
f(x) = -12x2 + 3x + 1
f(x) = 3x2 + 118 - 12
f(x) = 12x2 + 3x + 3
f(x) = 3x - 12

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function.a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.