6. You have a device that monitors the sound level of a conversation located 1 meter away. The results are shown in the graph. a. Describe the relationship of the sound level as a function of time. ound Level (dB)

I don't understand.

Pls help. Pls do all parts pls i beg.

2. The line models the height of a glider y, in feet, over x hours. Height of Glider a. Find the y-intercept of the graph. 4,000 3,000 b. What does the y-intercept represent? 2,000 1,000 0.5 1.5 Time (hr) Height (ft)

19 MA.912.AR.2.2 Write the equation of a vertical line passing through the ordered pair (-5,7.5). X÷-5

#7 Choose the letter of the correct answer.

Evan is investigating how long his phone's battery lasts (in hours) for various brightness levels (on a scale of 0-100). His data is displayed in the table and graph below. Brightness Level (x) 17 26 30 35 36 37 45 94 Hours (y) 6.7 5.9 5.8 4.5 6.8 6.1 3.8 2.1   10203040506070809010011012345678910-1Brightness LevelHours a) Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation.    b) Interpret the slope in context. Evan should expect -0.0604 hours per brightness level. Evan should expect -0.0604 brightness level per hour.   c) What does the equation predict for the number of hours the phone will last at a brightness level of 36?  hours