Please help, I need help.

I don't understand.

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Explain why the factor 1.5 is broke. into two numbers in the model.

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.