Manuel 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) 30 49 65 67 69 80 85 85 Hours (y) 6.6 4.6 4.1 4.3 3.5 2.8 3.1 10- 3. 2 10 20 30 40 50 Brightness Level 60 70 80 90 100 -1 a) Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation. Нours

A company has the following monthly sales for the past year.  Plot the data points on a line graph and describe the results. Month Sales 1 145 2 146 3 145 4 150 5 148 6 150 7 156 8 160 9 158 10 153 11 152 12 154

Can a low barometer reading be used to predict maximum wind speed of an approaching tropical cyclone? For a random sample of tropical cyclones, let x be the lowest pressure (in millibars) as a cyclone approaches, and let y be the maximum wind speed (in miles per hour) of the cyclone. x 1004 975 992 935 989 928 y 40 100 65 145 80 147   (a) Make a scatter diagram of the data and visualize the line you think best fits the data.   (b) Would you say the correlation is low, moderate, or strong? low moderate     strong   Would you say the correlation is positive or negative? positive negative       (c) Use a calculator to verify that          x = 5823,          x2 = 5,656,235,          y = 577,          y2 = 64,859  and          xy = 553,251   Compute r. (Round your answer to four decimal places.)     As x increases, does the value of r imply that y should tend to increase or decrease? Explain your answer. Given our value of r, y…

C. Describe the four characteristics of association

Kristin conducted an experiment in her science class to see how water drained from a container. The given graph shows the data that Kristin collected as a function of the height of the water over time. 80 70 60 50 40 30 20 10 10 20 30 Time (s) Kristin's two most accurately plotted points for the rate of flow of the water occurred when the height of the water was fifty-five centimeters after four seconds and when the height was twenty centimeters after fourteen seconds. Use these two data points to determine the equation for the line of best fit for Kristin's experiment. y = Height (cm)

Does the following table represent an even or odd function ?        x     y    -3   10.5    -2     2    -1    -.5    0    -2    1   -.5    2     2    3   10.5    4   19.7

Swordfish have a unique "heater organ" that maintains elevated eye and brain temperatures when hunting in deep, cold water. The following graph illustrates the results of a study by Fritsches et al. (2005) that measured how the ability of swordfish retinas to detect rapid motion, measured by the flicker fusion frequency, changes with eye temperature. 50 40 30- 20- 10 .. 5. 10 15 20 25 Eye temperature (°C) Whitlock&Schluter. The Analysis of Bological Dota, 3e2020 W.H.Freeman and Compsany Complete the sentences to form the correct statements about the type of the variables and the type of the graph displayed. The eye temperature is a categorical variable and the flicker fusion frequency is a numerical variable. The graph is a scatter plot. Flicker fusion frequency (hertz)

Interpret the graph. Is there a linear relationship between angle of rotation and reaction time? Describe the relationship.

Is this considered a weak, negative relationship between Carbon Monoxide and Temperature?

Given the graph below, what type of correlation would you predict there is between the variables? CAR PRICE DEPENDING ON AGE Price (dollars) 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000- 4. 10 Age (years) O Positive correlation O Negative correlation O No correlation