The birth rate, B, in births per hour, of a bacteria population is given in the figure. The curve marked D gives the death rate, in deaths per hour, of the same population. (a) Explain what the shape of each of these graphs tells you about the population. bacteria/hour B D 10 15 20 time (hours) In the beginning the birth and death rates are both increasing. Which is growing faster? The death rate is growing faster. Later, the birth rate decreases. After about 11 hours, the population begins increasing. (b) Use the graphs to find the time at which the net rate of increase of the population is at a maximum. The net rate of increase is at a maximum after about 12 hours.

Please answer all parts. Thanks.

Graph A Time (h) Graph B Time (h) Graph C Time (h) 2. Graphs A, B, and C show the amount of gasoline in a car's tank over time. Describe the rate of change for each graph. Tell what it could represent. Graph A: ● Graph B: Graph C:

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