Review the graph of f(x). On a coordinate plane, a horizontal line goes from (negative 5, 8) to (5, 8).

Pre-calc
What is the difference quotient of f(x)?

StartFraction 1 Over h Endfraction, h ≠ 0
StartFraction 8 Over h EndFraction, h ≠ 0
0, h ≠ 0
8, h ≠ 0

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.