The graph below includes the results of a linear regression using this data. (For example, the client identified with the triangle in the graph has a BMI of 30.36 and has cost the insurance company $62,592 over the previous 5 years.) Insurance Charges ($$) 70000 60000 50000 40000 30000 20000 10000 0 18 23 Males Smokers, aged 40 to 64 28 i BMI 33 Ta y = 1487x - 9399.7 R² = 0.6501 38 43 Interpret the value of the intercept of the regression line in the context of this question.

A downtown parking lot charges $5 per hour for the first 2 hours, then $2.50 per hour after that. Which equation(s) describes the total cost y as a function of the hours x?   1. Y = 5x + 2.5(x-2)   2. Y = 5x + 2.5x 3. Y = 5x for 2 hours or less, then Y =10 + 2.5(x-2) for over 2 hours 4. Y = 5x up to 2 hours then Y = 5x + 2.5x for over 2 hours

The length of each YouTube video viewed today. This represents a discrete variable This represents a continuous variable

Dr. Suarez, a veterinarian, wants to estimate the average number of calories a Chihuahua normally eats in a day. He will take a sample of n Chihuahuas and create a 99% confidence interval, percent for caloric intake of no more than 10 calories. A pilot study suggests that Chihuahuas' daily has a standard deviation of 36 calories. Which of these is the smallest approximate sample size required to obtain the desired margin of error Select one: a.86 b.68 c.50 d.36 e.30

23. TV sets: A Nielsen Company report states that the mean number of TV sets in a U.S. household is 2.24. Assume the standard deviation is 1.2. A sample of 85 households is drawn. a. What is the probability that the sample mean number of TV sets is greater than 2? b. What is the probability that the sample mean number of TV sets is between 2.5 and 3? c. Find the 30th percentile of the sample mean. d. Would it be unusual for the sample mean to be less than 2? e. Can you tell whether it would be unusual for an individual household to have fewer than 2 TV sets? Explain.

the operating expesnes of amazon increased from 3.6 billion in 2008 to 16.3 billion in 2012. use the information to find a linear model for amazons operating expesne E as a function of time t in years since 2010

Is the independent variable of a function associated with the domain or range? Is the dependent variable associated with the domain or range?

Does the function y = x3 ever have a negative slope? If so, where? Justify your answer.

please help me

3. The function y= 2x² is translated 1 unit to the right and 4 units down. The new function can be written and simplified in the form y=ax²-bx-c. Record the value of "a" in the first box. Record the value of "b" in the second box. Record the value of "e" in the third box. My answer: My confidence level: 1-2-3-4-5 The correct answer: