#5-9: Match each equation with the description of its graph below. y = - 10x
y = 2.5x - 7
7
y +1
y = 1.2x
Too
y = -5x - 8
5. My graph is non-proportional with a positive y-intercept.
6. My graph has a negative slope and passes through the origin.
7. My graph increases from left to right, and my "b" value is negative.
8. My graph contains the point (0,0) and has a positive slope.
9. My graph has a negative "m" value and a negative "b" value.

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.