Algebra. Volume 1. Second Edition by P. M. Cohn

By P. M. Cohn

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Graph the function on the viewing window [0, 100] by [0, 50,000]. Why is it reasonable to graph this model on a viewing window with the limitation C Ú 0? c. Find the point on the graph that corresponds to p = 90. Interpret the coordinates of this point. SOLUTION a. Because p represents the percent of pollution removed, it is limited to values from 0 to 100. However, p = 100 makes C undefined in this model, so p is restricted to 0 … p 6 100 for this model. 2 Graphs of Functions b. 20(a), with x representing p and y representing C.

If it is, how many elements are in the range of the function? 45. A business property valued at $300,000 is depreciated over 30 years by the straight-line method, so its value x years after the depreciation began is Depreciation V = 300,000 - 10,000x 46. Test Scores b. Is the average score on a placement test a function of the average score on the final exam in a course, if the table below defines the relationship? Average Score on Math Placement Test (%) 81 75 60 90 75 Average Score on Final Exam in Algebra Course (%) 86 70 58 95 81 49.

Do the respective values of x and y in the table satisfy the equation in part (b)? 2 Graphs of Functions 31.

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