Math 142 Name ________________________________ Spring 2018 Exam Score: ______________ Grade: _____ Exam 1 Where at all possible, you must show work to support your answers. A correct answer without supporting work or explanation will not receive full credit. Simplify all your answers and indicate your answers clearly. You have 1 hour and 15 minutes to finish the exam. Good luck! ________________________________________________________________________________________ 1. Let be the number of times a person can lift dumbbells that weigh pounds. n w Identify the independent and dependent variable. Dependent Variable: Independent Variable: ………………….. ………………… 2. Let be the cost (in dollars) of a 30-second ad during the Super Bowl at years since 1987. For most C t years, the annual increase in cost is more than the previous annual increase in cost. Sketch a qualitative graph that shows the relationship between the variables defined. Make sure to label your axes with correct variables. 3. Find the x- and y-intercepts of the graph of . Leave your answers in exact form (in fraction form). ( , ) x-intercept: ( , ) y-intercept:
Math 142 Name ________________________________ Spring 2018 Exam Score: ______________ Grade: _____ Exam 1 Where at all possible, you must show work to support your answers. A correct answer without supporting work or explanation will not receive full credit. Simplify all your answers and indicate your answers clearly. You have 1 hour and 15 minutes to finish the exam. Good luck! ________________________________________________________________________________________ 1. Let n be the number of times a person can lift dumbbells that weigh w pounds. Identify the independent and dependent variable. Independent Variable: ………………….. Dependent Variable: ………………… 2. Let C be the cost (in dollars) of a 30-second ad during the Super Bowl at t years since 1987. For most years, the annual increase in cost is more than the previous annual increase in cost. Sketch a qualitative graph that shows the relationship between the variables defined. Make sure to label your axes with correct variables. 3. Find the x- and y-intercepts of the graph of . Leave your answers in exact form (in fraction form). x-intercept: ( , ) y-intercept: ( , )
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