polynomial in one variable leading coefficient polynomial function power function end behavior quartic function quintic function
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2 polynomial in one variable leading coefficient polynomial function power function end behavior quartic function quintic function
3 Degrees and Leading Coefficients A. State the degree and leading coefficient of 7z 3 4z 2 + z. If it is not a polynomial in one variable, explain why. Answer: This is a polynomial in one variable. The degree is 3 and the leading coefficient is 7.
4 Degrees and Leading Coefficients B. State the degree and leading coefficient of 6a 3 4a 2 + ab 2. If it is not a polynomial in one variable, explain why. Answer: This is not a polynomial in one variable. It contains two variables, a and b.
5 Degrees and Leading Coefficients C. State the degree and leading coefficient of 3x 5 + 2x 2 4 8x 6. If it is not a polynomial in one variable, explain why. Answer: This is a polynomial in one variable. The greatest exponent is 6, so the degree is 6 and the leading coefficient is 8.
6 A. Determine whether 3x 3 + 2x 2 3 is a polynomial in one variable. If so, state the degree and leading coefficient. A. degree: 3 leading coefficient: 2 B. degree: 3 leading coefficient: 3 C. degree: 2 leading coefficient: 3 D. not a polynomial in one variable A B A. A B. B C. C D. D C D
7 B. Determine whether 3x 2 + 2xy 5 is a polynomial in one variable. If so, state the degree and leading coefficient. A. degree: 2 leading coefficient: 3 B. degree: 2 leading coefficient: 2 C. degree: 1 leading coefficient: 5 D. not a polynomial in one variable A B A. A B. B C. C D. D C D
8 C. Determine whether 9y 3 + 4y y 2 5y 7 is a polynomial in one variable. If so, state the degree and leading coefficient. A. degree: 6 leading coefficient: 4 B. degree: 7 leading coefficient: 5 C. degree: 7 leading coefficient: 5 D. not a polynomial in one variable A B A. A B. B C. C D. D C D
9 Evaluate a Polynomial Function RESPIRATION The volume of air in the lungs during a 5-second respiratory cycle can be modeled by v(t) = 0.037t t t, where v is the volume in liters and t is the time in seconds. This model is an example of a polynomial function. Find the volume of air in the lungs 1.5 seconds into the respiratory cycle. By substituting 1.5 into the function we can find v(1.5), the volume of air in the lungs 1.5 seconds into the respiration cycle.
10 Evaluate a Polynomial Function v(t) = 0.037t t t Original function v(1.5) = 0.037(1.5) (1.5) (1.5) Replace t with Simplify. Add. Answer: L
11 The height of a toy rocket during a 2.35 second flight is predicted by the function h(t) = 4t 3 + 6t 2 + 8t, where h is the height in meters and t is the time in seconds. This model is an example of a polynomial function. Find the height of the toy rocket 1.25 seconds into the flight. A meters B meters C meters D meters A B A. A B. B C. C D. D C D
12 Function Values of Variables Find b(2x 1) 3b(x) if b(m) = 2m 2 + m 1. Step 1. To evaluate b(2x 1), replace the m in b(m) with 2x 1.
13 Function Values of Variables Step 2. To evaluate 3b(x), replace m with x in b(m), then multiply the expression by 3. Original function Replace m with x. Distributive Property
14 Step 3. Function Values of Variables Now evaluate b(2x 1) 3b(x). b(2x 1) 3b(x) Replace b(2x 1) and 3b(x) with evaluated expressions. Distribute. = 2x 2 9x + 3 Simplify. Answer: 2x 2 9x + 3
15 Find g(2x + 1) 2g(x) if g(b) = b A. 1 B. 2x 2 + 4x 2 C. 2x 2 + 4x + 10 D. 2x 2 2 A. A B. B C. C D. D A B C D
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18 Graphs of Polynomial Functions A. For the graph, describe the end behavior, determine whether it represents an odd-degree or an evendegree function, and state the number of real zeros. Answer: f(x) as x + f(x) as x It is an even-degree polynomial function. The graph does not intersect the x-axis, so the function has no real zeros.
19 Graphs of Polynomial Functions B. For the graph, describe the end behavior, determine whether it represents an odd-degree or an evendegree function, and state the number of real zeros. Answer: f(x) + as x + f(x) as x It is an odd-degree polynomial function. The graph intersects the x-axis at one point, so the function has one real zero.
20 A. For the graph, determine whether it represents an odddegree or an even-degree function, and state the number of real zeros. A. It is an even-degree polynomial function and has no real zeros. B. It is an even-degree polynomial function and has two real zeros. C. It is an odd-degree polynomial function and has two real zeros. D. It is an odd-degree polynomial function and has no real zeros. A B A. A B. B C. C D. D C D
21 B. For the graph, determine whether it represents an odddegree or an even-degree function, and state the number of real zeros. A. It is an even-degree polynomial function and has three real zeros. B. It is an odd-degree polynomial function and has no real zeros. C. It is an odd-degree polynomial function and has three real zeros. D. It is an even-degree polynomial function and has no real zeros. A B A. A B. B C. C D. D C D
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