9.5_practice

# 9.5_practice - Mat120- Homework Practice - Section 9.5

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Unformatted text preview: Mat120- Homework Practice - Section 9.5 Name___________________________________ Class Hour:______________________________ Decide whether the relation defines a function. 1) {(-5, -1), (-2, 8), (4, 2), (5, 6)} 1) B) Not a function A) Function Determine whether the relation is a function. 2) x -9 -9 1 3 7 y 2 1 8 -2 7 2) B) Not a function A) Function Given the function, find the indicated value. 3) Find f(-2) when f(x) = 4x2 + 3x + 4. 3) C) 14 D) 6 A) 26 B) 2 Decide whether the relation is a function, and give the domain and range. 4) y 10 4) 5 -10 -5 -5 5 10 x -10 A) Function; domain: [-2, 8]; range: [3, 5] B) Not a function; domain: [-2, 8]; range: [3, 5] Page 1 of 2 Use the graph to find the indicated function value. 5) y = f(x). Find f(2). y 4 3 2 1 -4 -3 -2 -1 -1 -2 -3 -4 1 2 3 4 x 5) A) -2 Find the domain of the function. 6) f(x) = -9x x+3 B) 1.25 C) 2 D) 5 6) A) {xx is a real number and x < -3} C) {xx is a real number and x -3} Solve the problem. 7) Find (f + g)(4) when f(x) = x - 2 and g(x) = x + 1. B) {xx is a real number} D) {xx is a real number and x 0} 7) C) (f + g)(4) = 5 D) (f + g)(4) = 11 8) A) (f + g)(4) = 7 B) (f + g)(4) = 9 8) Find ( f )(-3) when f(x) = 4x - 3 and g(x) = 5x2 + 14x + 4. g A) ( f )(-3) = - 5 g g 9 B) ( f )(-3) = - 15 g g 7 C) ( f )(-3) = 5 7 D) ( f )(-3) = 4 7 Page 2 of 2 Answer Key Testname: 9.5_PRACTICE 1) 2) 3) 4) 5) 6) 7) 8) A B C B B C A B Page 3 of 2 ...
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## This note was uploaded on 05/05/2008 for the course MAT 120/222/10 taught by Professor None during the Spring '08 term at ASU.

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