AnswersEF Math 12 1st Nine WeeksDomain and Range

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Of the relations graphed below, three are functions and one is not.Which of the relations is NOT a function? a. Graph A b. Graph B c. Graph C d. Graph D Please select the best answer from the choices provided

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When you were born, your uncle put $1000 into a bank account for you. According to the terms of the account, your investment grows in a manner represented by the following graph. Which variable is the independent variable? Which variable is the dependent variable? If you are 18 years old, how much money is in the account? a. Dollars; years; $2800 c. Dollars; years; $2500 b. Time; amount; $2500 d. Time; amount; $2800 Please select the best answer from the choices provided

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The speed, s, of an ant (in centimeters per second) is related to the temperature, t (in degrees Celsius), by the formula If an ant is moving at 4 centimeters per second, what is the temperature? Round your answer to the nearest degree. a. b. c. d. Please select the best answer from the choices provided

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Solve the equation. Then check your solution. a. 0.7 c. 1.3 b. –0.3 d. 0.3 Please select the best answer from the choices provided

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The graph above represents a step function. A graph of a step function resembles the steps of a staircase and is not continuous. The black dot represents a closed endpoint (to include) and the white dot represents an open endpoint (do not include). Utilizing the graph, how much does it cost to park for 2 hours? a. $3 c. $9 b. $6 d. $12 Please select the best answer from the choices provided

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The equation V = -2000t + 20,000 describes the value in dollars of a certain model of car after it is t years old. If a car is worth $14,000, find the age of the car.a.5 yearsc.3 yearsb.4 yearsd.2 years

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Describe what is happening in this graph with regards to the number of people in an amusement park on a summer day.

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Give the domain and range. a. domain: {1, –1, –3}, range: {–2, 0, 2} b. domain: {1, –1, –3}, range: {2, 0, 2} c. domain: {2, 0, 2}, range: {1, –1, –3} d. domain: {–2, 0, 2}, range: {1, –1, –3} Please select the best answer from the choices provided

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Solve the equation for x. (x - 4) - (x + 7) = 8x a. c. b. d. Please select the best answer from the choices provided

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Medical researchers have determined that for exercise to be beneficial, a person’s desirable heart rate, R, in beats per minute, can be approximated by the formulas for women for men, where a represents the person’s age. If the desirable heart rate for a woman is 130 beats per minute, how old is she? a. 84 years old b. 57 years old c. 37 years old d. 20 years old Please select the best answer from the choices provided

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Solve the equation. Then check your solution. a. –512 c. –2 b. 7 d. –7 Please select the best answer from the choices provided

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The equation V = -2000t + 20,000 describes the value in dollars of a certain model of car after it is t years old. If a car is worth $14,000, find the age of the car.a.5 yearsc.3 yearsb.4 yearsd.2 years

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Solve the equation. Then check your solution. a. 53 c. –185 b. 186 d. 185 Please select the best answer from the choices provided

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Finish the following table for the given function with x as the independent variable. x f(x) 0 10 5 10 15 a. 95, 90, 85 b. 9.75, 9.49, 9.22 c. 9.75, 9.22, 9.49 d. 10, 9, 8 Please select the best answer from the choices provided

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Which graph matches the following statement? You are driving a steady speed, then stop for a train. When the train passes, you resume your speed. a. c. b. d. Please select the best answer from the choices provided

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