Linear Programming — Test Answers

Make a scatter plot of the data below. Speed (mph) Stopping distance (ft) 10 12.5 20 36.0 30 69.5 40 114.0 50 169.5 60 249.0 70 325.5 Using the quadratic regression equation predict what your stopping distance would be if you were going 80 miles per hour. a. 363.2 ft b. 412.8 ft c. 355.2 ft d. 33.6 ft Please select the best answer from the choices provided

The data set represents a progression of hourly temperature measurements. Use a graphing calculator to determine the quadratic regression equation for this data set. Round all coefficients to the nearest thousandth. x 0 1 2 3 4 5 y 20 16 10 0 -7 -20 Which equation best represents the quadratic regression model for this data? a. c. b. d.

Solve the problem. A ball is kicked upward with an initial velocity of 68 feet per second. The ball's height, h (in feet), from the ground is modeled by , where t is measured in seconds. What is the practical domain in this situation? a. c. All real numbers b. d. Please select the best answer from the choices provided

The data set represents a progression of hourly temperature measurements.Use the regression equation to predict the temperature during the sixth hour. x 0 1 2 3 4 5 y 20 16 10 0 -7 -20 a. -24 c. -25 b. -15 d. -32 Please select the best answer from the choices provided

Solve the problem. A ball is kicked upward with an initial velocity of 52 feet per second. The ball's height, h (in feet), from the ground is modeled by , where t is measured in seconds. How much time does the ball take to reach its highest point? What is its height at this point? a. 1.625 sec; 84.5 ft c. 3.25 sec; 42.25 ft b. 1.625 sec; 42.25 ft d. 3.25 sec; 126.75 ft Please select the best answer from the choices provided

When dealing with Quadratic Regression, what is one of the first things that needs to be done on the graphing calculator?a.graphc.create a scatterplotb.label the graphd.calculate the quadratic regression

Solve the problem. A ball is kicked upward with an initial velocity of 56 feet per second. The ball's height, h (in feet), from the ground is modeled by , where t is measured in seconds. What is the practical domain in this situation? a. c. All real numbers b. d. Please select the best answer from the choices provided

The data set represents a bimonthly progression of gasoline prices over the course of several months in an unspecified city. Use a graphing calculator to determine the quadratic regression equation for this data set. x 0 2 4 6 8 y 2.86 2.89 2.93 3.04 3.11 a. c. b. d. Please select the best answer from the choices provided

Make a scatter plot of the data below. x y 25 150 50 178 75 216 100 265 125 323 150 392 175 470.4 Use the quadratic regression feature of a graphing calculator to find a quadratic model. Round to the nearest thousdandths place. a. b. c. d. Please select the best answer from the choices provided

Look at the quadratic regression equation below to answer the following question: For what value of x is ? (Use the quadratic formula to help solve the problem, ) a. b. c. d. Please select the best answer from the choices provided

What is the value of c in the given quadratic regression equation? a. 1 c. 1.23 b. -0.19 d. 0 Please select the best answer from the choices provided

The data set represents a month-to-month progression of gasoline prices over the course of several months in an unspecified city. Use a graphing calculator to determine the quadratic regression equation for this data set. x 0 1 2 3 4 5 y 2.82 3.29 3.46 3.33 2.88 2.24 a. c. b. d. Please select the best answer from the choices provided

The Air Quality Index, or AQI, measures how polluted the air is in your city and assigns a number based on the quality of the air. Over 100 is "Unhealthy". The following quadratic regression equation, models the AQI over time, where n represents the number of days the AQI exceeded 100, and t represents the number of years since 1990. Estimate the number of days the AQI exceeded 100 in the year 2002. Round to the nearest whole day. (Hint: t = 0 corresponds to the year 1990.) a. 281 days b. 97 days c. 135 days d. 52 days Please select the best answer from the choices provided

The data set represents a month-to-month progression of gasoline prices over the course of several months in an unspecified city. Use a graphing calculator to determine the quadratic regression equation for this data set. x 0 1 2 3 4 5 y 1.30 1.34 1.38 2.20 2.88 2.24 a. c. b. d. Please select the best answer from the choices provided

Fill in the blank by choosing the most appropriate word.Regression equations are usually used to predict values of unavailable data. If the data do not closely model a particular type of function, then that type of function is not appropriate to use in statistical regression. The more closely data fit a model, the more _______________ predicted values will be.a.accurateb.quadraticc.scatteredd.variable

Make a scatter plot of the data below. x y 25 150 50 178 75 216 100 265 125 323 150 392 175 470.4 Using the quadratic regression equation predict what the y-value will be if the x-value is 200. a. y = 83.5 b. y = 346.9 c. y = 238.1 d. y = 555.5 Please select the best answer from the choices provided

Solve the problem. A jump rope held stationary by two children, one at each end, hangs in a shape that can be modeled by the equation , where h is the height (in inches) above the ground and x is the distance (in inches) along the ground measured from the horizontal position of one end. How close to the ground is the lowest part of the rope? a. 2 in. c. 2.25 in. b. 3 in. d. 1.5 in. Please select the best answer from the choices provided

In a Quadratic Regression problem, a graph is a perfect fit for the data when r = ?a.1c.2b.0d.100

Solve the problem. A ball is kicked upward with an initial velocity of 68 feet per second. The ball's height, h (in feet), from the ground is modeled by , where t is measured in seconds. How much time does the ball take to reach its highest point? What is its height at this point? a. 4.25 sec; 72.25 ft c. 2.125 sec; 144.5 ft b. 4.25 sec; 216.75 ft d. 2.125 sec; 72.25 ft Please select the best answer from the choices provided

Suppose that a water fountain produces a stream of water that follows the shape of a parabola. Assigning the origin of a coordinate system to the point where the water stream emerges from the fountain, a measurement shows that the maximum height of the stream occurs at the point (6, 5). Use symmetry to identify a third point and find a quadratic regression equation for the stream of water. a. c. b. d. Please select the best answer from the choices provided